Learn which Cronk Nutrient line is best for your plants. Compare the Classic 3-Part, Bonnie & Clyde Autoflower system, and PuurOrganics for organic growers.

When starting your grow, one of the biggest questions is which nutrients to use.At Cronk Nutrients, we&#x2019;ve made it easy for growers of all experience levels to pick the perfect formula &#x2014; whether you&#x2019;re growing cannabis, houseplants, or garden vegetables.Each Cronk line is built for a specific growing style, giving you the flexibility to choose what fits your goals, your medium, and your level of experience.<hr><h2 id="the-cronk-classic-line-3-part-system">The Cronk Classic Line (3-Part System)</h2>Best for: Growers who want full control and flexibilityWorks great in: Soil, coco, hydroponics, and drain-to-waste systemsThe Classic 3-Part Base System &#x2014; Grow (2-1-6), Micro (5-0-1), and Bloom (0-5-3) &#x2014; gives you the power to fine-tune nutrients for every growth stage. <h3 id="why-growers-love-it">Why growers love it:</h3>&#x2705; Complete control over NPK ratios at every stage&#x2705; Clean, liquid formula that mixes easily &#x2014; no residue or clumping&#x2705; Suitable for all plant types and all grow systems&#x2705; Perfect for both beginners and advanced growers <h3 id="how-to-use-it">How to use it:</h3><ul style=" text-decoration: none;"><li>During the vegetative stage, focus on Grow + Micro for lush green growth.</li><li>In bloom, shift to Bloom + Micro to boost flowering and yield.</li><li>Always mix Micro first, then Grow and Bloom, checking pH (5.8&#x2013;6.2 for coco/hydro; 6.0&#x2013;6.8 for soil).</li></ul>The Classic Line is the go-to option for anyone who wants a&#xA0;pro-level feeding system that&#x2019;s easy to adjust as your plants grow. <hr style=" text-decoration: none;"><h2 id="bonnie--clyde-autoflower-nutrients">Bonnie &amp; Clyde (Autoflower Nutrients)</h2>Best for: Autoflower growers who want simplicity and resultsWorks great in: Soil, coco, and soilless mixesAutoflowers grow fast and don&#x2019;t wait for you to switch their light cycle &#x2014; that&#x2019;s why they need a nutrient system designed for their shorter life span.Bonnie &amp; Clyde are perfectly balanced to give autos everything they need, without the risk of overfeeding.<ul style=" text-decoration: none;"><li>Bonnie (6-5-4): Fuels strong vegetative growth and healthy roots</li><li>Clyde (3-6-5): Powers dense flowers, resin production, and terpene quality</li></ul> <h3 id="why-growers-love-it-1">Why growers love it:</h3>&#x2705; Two bottles &#x2014; simple and streamlined&#x2705; Perfectly balanced for 8-12-week autoflower cycles&#x2705; Delivers complete nutrition without heavy salts&#x2705; Less guesswork &#x2014; more time enjoying the grow <h3 id="pro-tip">Pro tip:</h3>Add CalMag (2-0-0) alongside Bonnie during veg and Clyde during flower.This keeps calcium and magnesium levels steady, especially under LED lights or in coco coir.Bonnie &amp; Clyde are ideal for new growers, small spaces, and anyone who wants a simple, efficient nutrient plan that still delivers professional results.<hr style=" text-decoration: none;"><h2 id="puurorganics-organic-line">PuurOrganics (Organic Line)</h2>Best for: Growers seeking clean, plant-based, organic nutritionWorks great in: Soil, living soil, coco, and peat-based mixesIf you prefer to grow the natural way, PuurOrganics delivers high-performance results with zero synthetic salts.Made from upcycled, eco-friendly plant materials, this line offers complete nutrition that&#x2019;s&#xA0;easy to use and completely water-soluble. <h3 id="why-growers-love-it-2">Why growers love it:</h3>&#x2705; 100% plant-based &amp; eco-friendly&#x2705; No mess &#x2014; liquid, water-soluble, and sediment-free&#x2705; Ideal for living soil and regenerative gardens&#x2705; Gentle on microbes, strong on results <h3 id="important-tip">Important tip:</h3>PuurOrganics is not recommended for AutoPot systems or DWC hydro setups &#x2014; organic matter can clog lines.Stick with soil, coco, or drip-to-waste systems for best performance.PuurOrganics makes organic growing simple &#x2014; clean, efficient, and powerful enough for any crop.<hr style=" text-decoration: none;"><h2 id="quick-comparison">Quick Comparison</h2><table style="text-decoration: none; width: 100%;" id="isPasted"><thead><tr><th style="text-align: center;">Nutrient Line</th><th style="text-align: center;">Best For</th><th style="text-align: center;">Grow Mediums</th><th style="text-align: center;">Number of Bottles</th><th style="text-align: center;">Add CalMag?</th></tr></thead><tbody><tr><td style="text-align: center;">Classic (3-Part)</td><td style="text-align: center;">Full control for any grow type</td><td style="text-align: center;">Soil, Coco, Hydro</td><td style="text-align: center;">3</td><td style="text-align: center;">Optional</td></tr><tr><td style="text-align: center;">Bonnie &amp; Clyde</td><td style="text-align: center;">Autoflower growers</td><td style="text-align: center;">Soil, Coco</td><td style="text-align: center;">2 + 1</td><td style="text-align: center;">&#x2705; Yes</td></tr><tr><td style="text-align: center;">PuurOrganics</td><td style="text-align: center;">Organic &amp; sustainable grows</td><td style="text-align: center;">Soil, Coco, Living Soil</td><td style="text-align: center;">5</td><td style="text-align: center;">Optional (1x/month)</td></tr></tbody></table><hr><h2 id="final-thoughts">Final Thoughts</h2>Whether you&#x2019;re running a hydro setup, growing autoflowers in coco, or building a living soil garden &#x2014; Cronk Nutrients has a system built for you.<ul style=" text-decoration: none;"><li>Classic Line: Maximum control and flexibility</li><li>Bonnie &amp; Clyde: Simplicity for fast-growing autos</li><li>PuurOrganics: Clean, eco-friendly nutrition for sustainable gardens, most control.&#xA0;</li></ul> Each formula is made to mix easily, feed cleanly, and deliver consistent results.Start with the system that fits your grow style &#x2014; and let Cronk Nutrients do the rest. &#x1F331;<script type="application/ld+json">
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Choosing the Right Cronk Nutrients for Your Grow

Learn what NPK means on fertilizer labels and how nitrogen, phosphorus, and potassium help plants grow strong, bloom big, and stay healthy.

If you&#x2019;ve ever looked at a bottle of plant food and seen numbers like 6-5-4 or 2-1-6, you might wonder &#x2014; what do these mean? Those numbers aren&#x2019;t random! They show how much of the three main nutrients &#x2014; Nitrogen (N), Phosphorus (P), and Potassium (K) &#x2014; are in your fertilizer.Together, these nutrients are called macronutrients, and every plant needs them to grow healthy and strong.Let&#x2019;s break it down. <h2 style=" text-decoration: none;" id="n--nitrogen--for-green-growth">&#xA0;N = Nitrogen &#x2014; For Green Growth</h2>Nitrogen helps plants grow tall, green, and full. It&#x2019;s the key ingredient for making chlorophyll, the pigment that allows plants to turn sunlight into energy through photosynthesis.&#x1F7E2; Too little nitrogen: Pale or yellow leaves, slow growth.&#x1F7E2; Too much nitrogen: Big leafy plants, but fewer flowers or fruits. &#x1F449; Best for: Early growth (the vegetative stage).Example: Cronk&#x2019;s Grow (2-1-6) or Bonnie (6-5-4) are nitrogen-rich formulas that support strong leaves and stems.<hr><h2 style=" text-decoration: none;" id="p--phosphorus--for-roots-and-flowers">P = Phosphorus &#x2014; For Roots and Flowers</h2>Phosphorus gives plants the energy to build roots, flowers, and fruits. It helps them use nutrients and grow strong from the inside out.&#x1F49C; Too little phosphorus: Purple or red stems, slow root growth, small buds or flowers.&#x1F49C; Too much phosphorus: Can block other nutrients like zinc and iron. &#x1F449; Best for: Early rooting and flowering stages.Example: Cronk&#x2019;s Bloom (0-5-3) or Clyde (3-6-5) give your plants a phosphorus boost during bloom. Or if you are wanting organic phosphorus, our PuurPhos (0-12-0)&#xA0;<hr><h2 style=" text-decoration: none;" id="k--potassium--for-strength-and-quality">K = Potassium &#x2014; For Strength and Quality</h2>Potassium helps plants stay strong and healthy. It controls how plants move water, fight off stress, and develop full, flavorful buds or fruits.&#x1F9E1; Too little potassium: Brown leaf edges, weak stems, poor flower and fruit quality.&#x1F9E1; Too much potassium: Can block calcium or magnesium absorption. &#x1F449; Best for: Bloom and late flower stages.Example: Cronk&#x2019;s Bud Booster (0-1-3) and PuurK (0-0-15) help plants build stronger, denser flowers.<hr><h2 style=" text-decoration: none;" id="putting-it-all-together">Putting It All Together</h2>When you see something like 6-5-4, that means the fertilizer has:<ul style=" text-decoration: none;"><li>6% Nitrogen</li><li>5% Phosphorus</li><li>4% Potassium</li></ul>The rest is made up of water, trace minerals, and other helpful ingredients.Each stage of growth needs a different balance of these nutrients &#x2014; that&#x2019;s why Cronk Nutrients created easy-to-follow systems like:<ul style=" text-decoration: none;"><li>Classic Line (3-Part System): Grow, Micro, and Bloom &#x2014; full control for any grower.</li><li>Bonnie &amp; Clyde: Designed for autoflowers &#x2014; fewer bottles, simpler feedings.</li><li>PuurOrganics: Clean, sustainable plant-based nutrition for organic growers.</li></ul><hr><h2 style=" text-decoration: none;" id="quick-tip-feeding-by-stage">Quick Tip: Feeding by Stage</h2><table style="text-decoration: none; width: 100%;" id="isPasted"><thead><tr><th>Stage</th><th>What Plants Need Most</th><th>Example Product</th></tr></thead><tbody><tr><td>Seedling</td><td>Very light nutrients</td><td>PuurBalance or diluted base</td></tr><tr><td>Vegetative</td><td>More Nitrogen (N)</td><td>Grow or Bonnie</td></tr><tr><td>Flowering</td><td>More Phosphorus (P) &amp; Potassium (K)</td><td>Bloom or Clyde</td></tr><tr><td>Late Flower</td><td>Higher Potassium (K)</td><td>Bud Booster or PuurK</td></tr></tbody></table><hr><h2 style=" text-decoration: none;" id="final-thoughts">Final Thoughts</h2>Understanding NPK helps you choose the right nutrients at the right time. Think of it like a balanced diet for your plants &#x2014; nitrogen for growth, phosphorus for roots and flowers, and potassium for strength and quality.No matter what you&#x2019;re growing &#x2014; herbs, vegetables, or cannabis &#x2014; knowing how to read those numbers is the first step to growing healthier, happier plants.<script type="application/ld+json">
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Understanding NPK: What Those Numbers on Your Fertilizer Really Mean

Learn the real differences between liquid and dry fertilizers. Backed by grower research and agronomy studies, discover why liquid nutrients deliver faster, more consistent feeding for cannabis, vegetables, and houseplants.

When it comes to feeding your plants, one of the first decisions you&#x2019;ll face is whether to use liquid or dry (powder or granular) nutrients. Both options can grow healthy plants&#x2014;but they work differently, and each has its own pros and cons.This guide breaks down the science, real-world grower feedback, and research so you can make an informed choice. Spoiler: most home and small-scale growers find liquid nutrients give them more control, consistency, and faster results.<hr><h2 style=" text-decoration: none;" id="whats-the-difference-between-liquid-and-dry-nutrients">What&#x2019;s the Difference Between Liquid and Dry Nutrients?</h2><h3 style=" text-decoration: none;" id="liquid-nutrients">Liquid Nutrients</h3>Liquid fertilizers come pre-dissolved in water, so nutrients are immediately available to your plants. You simply measure, mix, and feed&#x2014;making them ideal for beginners and precise growers alike.<h3 style=" text-decoration: none;" id="dry-nutrients">Dry Nutrients</h3>Dry fertilizers come as powders or granules that must dissolve in water or soil moisture before plants can absorb them. They&#x2019;re highly concentrated and cost-effective for bulk or outdoor grows but require careful mixing to stay consistent.<hr><h2 style=" text-decoration: none;" id="comparing-liquid-vs-dry-nutrients">Comparing Liquid vs. Dry Nutrients</h2><table style="text-decoration: none; width: 100%;" id="isPasted"><thead><tr><th style="text-align: center;">Feature</th><th style="text-align: center;">Liquid Nutrients</th><th style="text-align: center;">Dry Nutrients</th></tr></thead><tbody><tr><td style="text-align: center;">Ease of Use</td><td style="text-align: center;">Ready to mix and feed</td><td style="text-align: center;">Requires dissolving and precise measurement</td></tr><tr><td style="text-align: center;">Nutrient Uniformity</td><td style="text-align: center;">Every drop contains identical nutrients (<a href="https://www.canr.msu.edu/news/pros_and_cons_of_granular_and_liquid_fertilizers">MSU Extension</a>)</td><td style="text-align: center;">Granules can separate or settle in storage (<a href="https://feeco.com/complex-fertilizers-outperform-blends-in-uniform-nutrient-distribution">FEECO</a>)</td></tr><tr><td style="text-align: center;">Absorption Speed</td><td style="text-align: center;">Immediate plant uptake</td><td style="text-align: center;">Slower&#x2014;must dissolve or mineralize first</td></tr><tr><td style="text-align: center;">Shelf Life</td><td style="text-align: center;">1&#x2013;2 years (shake before use)</td><td style="text-align: center;">Up to 5+ years if kept dry</td></tr><tr><td style="text-align: center;">Cost</td><td style="text-align: center;">Slightly higher per gallon</td><td style="text-align: center;">Lower cost for large-scale use</td></tr><tr><td style="text-align: center;">Precision Feeding</td><td style="text-align: center;">Easy to fine-tune ratios</td><td style="text-align: center;">More difficult to balance exactly</td></tr><tr><td style="text-align: center;">Best For</td><td style="text-align: center;">Indoor, coco, hydro, and small grows</td><td style="text-align: center;">Outdoor or commercial operations</td></tr></tbody></table><hr><h2 style=" text-decoration: none;" id="why-many-growers-prefer-liquid-nutrients">Why Many Growers Prefer Liquid Nutrients</h2><ol start="1" style=" text-decoration: none;"><li>Consistent Nutrient DeliveryLiquids are evenly mixed, ensuring each drop has the same N-P-K ratio. Dry or granular fertilizers, on the other hand, can segregate&#x2014;heavier granules may contain more potassium, while lighter ones contain nitrogen, leading to uneven feeding (<a href="https://feeco.com/complex-fertilizers-outperform-blends-in-uniform-nutrient-distribution">FEECO</a>).</li><li>Immediate AvailabilityLiquids deliver nutrients that plants can absorb right away, without waiting for breakdown or microbial conversion. This means faster recovery from deficiencies and quicker visible results (<a href="https://livetoplant.com/benefits-of-liquid-inputs-versus-granular-fertilizer-applications">LiveToPlant.com</a>).</li><li>Uniform Mixing and CoverageAccording to Michigan State University Extension, every drop of a liquid fertilizer contains identical nutrient ratios, while granular applications can leave &#x201C;hot spots&#x201D; or underfed areas if not distributed perfectly (<a href="https://www.canr.msu.edu/news/pros_and_cons_of_granular_and_liquid_fertilizers">MSU Extension</a>).</li><li>Precise Control for Cannabis and AutoflowersLiquids make it easy to measure mL per liter or gallon, follow a feed chart, and fine-tune ratios at each growth stage. This precision is especially important for fast-growing plants like autoflower cannabis, where nutrient timing and balance matter most.</li><li>Cleaner, Faster MixingNo need for vigorous stirring or waiting for powders to dissolve. Liquid nutrients mix cleanly and stay stable in solution&#x2014;ideal for hydroponic or drip-feed systems.</li></ol><hr style=" text-decoration: none;"><h2 style=" text-decoration: none;" id="when-dry-nutrients-make-sense">When Dry Nutrients Make Sense</h2>To keep things fair, dry fertilizers do have benefits&#x2014;especially for large or commercial growers:<ul style=" text-decoration: none;"><li>Lower cost per pound &#x2014; Dry formulas are concentrated and cheaper to ship.</li><li>Long shelf life &#x2014; They store for years if kept sealed and dry.</li><li>Customizable &#x2014; Experienced growers can create their own nutrient blends.</li><li>Lower plastic waste &#x2014; Dry nutrients typically use less packaging.</li></ul>That said, they also require accurate mixing equipment, regular agitation, and careful calibration to prevent uneven distribution. Agricultural studies show that even small inconsistencies in spreading or mixing can cause nutrient &#x201C;streaking&#x201D; in fields (<a href="https://crops.extension.iastate.edu/post/now-time-prepare-fertilizer-applications">Iowa State Extension</a>).<hr style=" text-decoration: none;"><h2 style=" text-decoration: none;" id="&#xFE0F;-common-challenges-with-dry-fertilizers">&#x26A0;&#xFE0F; Common Challenges with Dry Fertilizers</h2><ul style=" text-decoration: none;"><li>Uneven nutrient distribution &#x2014; Granules or powders can separate during shipping or storage (<a href="https://feeco.com/complex-fertilizers-outperform-blends-in-uniform-nutrient-distribution">FEECO</a>).</li><li>Incomplete dissolution &#x2014; Some minerals don&#x2019;t fully dissolve, especially in hard or cold water.</li><li>Nutrient burn risk &#x2014; Concentrated granules can create &#x201C;hot spots&#x201D; if not mixed thoroughly (<a href="https://www.canr.msu.edu/news/pros_and_cons_of_granular_and_liquid_fertilizers">MSU Extension</a>).</li><li>Delayed results &#x2014; Nutrients must dissolve or mineralize before plants can use them, slowing uptake.</li></ul>Agronomically, research shows that liquid and dry fertilizers can perform equally well&#x2014;if conditions are ideal and application is precise (<a href="https://www.cropnutrition.com/nutrient-management/fluid-and-dry-fertilizers">Crop Nutrition by Mosaic</a>). But in practical, everyday grows, liquids tend to be easier and more reliable.<hr><h2 style=" text-decoration: none;" id="-why-liquid-nutrients-win-for-most-small-and-indoor-grows">&#x1F33F; Why Liquid Nutrients Win for Most Small and Indoor Grows</h2><ul style=" text-decoration: none;"><li>Simpler for beginners &#x2013; fewer steps, less room for error.</li><li>Consistent feeding results &#x2013; every dose delivers identical nutrition.</li><li>Faster plant response &#x2013; nutrients are immediately available.</li><li>Ideal for cannabis, herbs, and vegetables in soil, coco, or hydro.</li><li>Cleaner systems &#x2013; fewer clogs and salt buildup.</li></ul>That&#x2019;s why Cronk Nutrients developed three liquid nutrient lines that make feeding simple, clean, and effective:<ul style=" text-decoration: none;"><li><a href="https://www.cronknutrients.com/collections/classic-line-3-part-system" target="_blank" rel="noopener noreferrer">Classic Line (3-Part System)</a> &#x2013; Complete control from seed to harvest.</li><li><a href="https://www.cronknutrients.com/collections/bonnie-clyde-autoflower-line" target="_blank" rel="noopener noreferrer">Bonnie &amp; Clyde (Autoflower Line)</a> &#x2013; Designed for short life cycles and simple feeding.</li><li><a href="https://www.cronknutrients.com/collections/puur-organics" target="_blank" rel="noopener noreferrer">PuurOrganics (Organic Line)</a> &#x2013; Sustainable, plant-based, and clean for natural growers.</li></ul><hr style=" text-decoration: none;"><h2 style=" text-decoration: none;" id="final-thoughts">Final Thoughts</h2>Both liquid and dry fertilizers can grow healthy plants, but for most home, hobby, and cannabis growers, liquid nutrients provide easier mixing, faster uptake, and more consistent results.They remove the guesswork from feeding and help ensure your plants get exactly what they need&#x2014;every time.<script type="application/ld+json">
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Liquid Nutrients vs. Dry Nutrients: Which Is Best for Your Grow?

Learn how calcium, magnesium, and iron strengthen plants, improve nutrient uptake, and prevent yellowing. Understand how CalMag supports healthy, balanced growth.

If you&#x2019;ve spent any time growing plants, you&#x2019;ve probably heard people talk about CalMag &#x2014; and for good reason.CalMag is one of the most useful supplements you can add to your nutrient lineup, helping prevent yellowing leaves, weak stems, and poor nutrient uptake.Even if you&#x2019;re already using a balanced base nutrient, your plants may still need extra calcium and magnesium &#x2014; especially when growing in coco coir, hydroponic systems, or under LED lighting.<hr><h2 id> </h2><h2 id="what-is-calmag">What Is CalMag?</h2>CalMag is short for Calcium (Ca) and Magnesium (Mg) &#x2014; two essential secondary nutrients that plants need in relatively large amounts.Some formulations, like <a href="https://www.cronknutrients.com/collections/additives-boosters/products/calmag-complete-calcium-magnesium-and-iron-plant-supplement?variant=47700566769975" target="_blank" rel="noopener noreferrer">Cronk Nutrients CalMag (2-0-0)</a>, also include Iron (Fe) for added chlorophyll support and greener growth. <ul style=" text-decoration: none;"><li>Calcium (Ca): Strengthens plant cell walls, improves root development, and helps transport nutrients throughout the plant.</li><li>Magnesium (Mg): The central element in chlorophyll &#x2014; essential for photosynthesis and energy production.</li><li>Iron (Fe): (Only in certain formulas like Cronk&#x2019;s) Prevents chlorosis and supports new leaf growth by improving chlorophyll formation.</li></ul> Together, these elements help plants stay strong, vibrant, and productive from seed to harvest.<hr><h2 id="why-calmag-is-so-important">Why CalMag Is So Important</h2>Plants rely on calcium and magnesium daily to stay healthy. When they don&#x2019;t get enough, growth slows down, and visible symptoms appear fast. <h4 style=" text-decoration: none;" id="-benefits-of-using-calmag">&#x2705; Benefits of Using CalMag:</h4><ul style=" text-decoration: none;"><li>Prevents common deficiencies: Stops yellowing leaves, brown spots, and weak stems.</li><li>Improves nutrient uptake: Keeps other nutrients balanced and mobile within the plant.</li><li>Enhances photosynthesis: Magnesium and iron keep leaves green and energy production steady.</li><li>Strengthens roots and structure: Calcium builds resilient cells that help plants handle stress.</li><li>Supports heavy yields: Healthy cell walls and balanced nutrients mean bigger, better buds or fruit.</li></ul><hr style=" text-decoration: none;"><h2 id="&#xFE0F;-signs-your-plants-may-need-calmag">&#x26A0;&#xFE0F; Signs Your Plants May Need CalMag</h2>Deficiencies in calcium or magnesium can look different, but both can seriously impact plant growth.Look out for:<ul style=" text-decoration: none;"><li>Yellowing between leaf veins (magnesium or iron deficiency)</li><li>Brown or rusty spots on older leaves (calcium deficiency)</li><li>Curled, brittle new growth</li><li>Weak stems or slowed overall growth</li></ul>These symptoms are most common when growing in coco coir, hydroponic setups, or using reverse osmosis (RO) or soft water &#x2014; environments that naturally lack calcium and magnesium.<hr style=" text-decoration: none;"> <h3 style=" text-decoration: none;" id="-how-to-use-calmag">&#x1F4A7; How to Use CalMag</h3>1&#xFE0F;&#x20E3; Mix first: Always add CalMag before other nutrients beside if you are using a product like <a href="https://www.cronknutrients.com/collections/classic-line-3-part-system/products/micro-5-0-1?variant=47700568375607" target="_blank" rel="noopener noreferrer">Micro 5-0-1</a>, &#xA0;and let it sit for 5&#x2013;10 minutes before continuing your mix.2&#xFE0F;&#x20E3; Frequency:<ul style=" text-decoration: none;"><li>Use once a week for general feeding.</li><li>Every watering if growing in coco or using RO water.3&#xFE0F;&#x20E3; Check your pH:</li><li>5.8&#x2013;6.2 for hydro and coco.</li><li>6.0&#x2013;6.8 for soil.</li></ul>Pro Tip: If your tap water is hard (above ~250 ppm), you may not need CalMag every feeding &#x2014; too much can cause nutrient imbalances.<hr style=" text-decoration: none;"><h2 id="about-cronk-nutrients-calmag-2-0-0">About Cronk Nutrients CalMag (2-0-0)</h2>Cronk Nutrients&#x2019; CalMag (2-0-0) goes a step beyond standard formulas by including iron (Fe) for greener leaves and stronger growth.It&#x2019;s clean, easy to mix, and fully compatible with every Cronk Nutrients system &#x2014; from the <a href="https://www.cronknutrients.com/collections/classic-line-3-part-system/products/3-part-base-kit-micro-grow-bloom?variant=47700566212919" target="_blank" rel="noopener noreferrer">Classic 3-Part</a> to <a href="https://www.cronknutrients.com/collections/bonnie-clyde-autoflower-line" target="_blank" rel="noopener noreferrer">Bonnie &amp; Clyde</a> or <a href="https://www.cronknutrients.com/collections/puur-organics" target="_blank" rel="noopener noreferrer">PuurOrganics.</a>Adding it once a week helps prevent nutrient gaps and keeps your plants healthy and balanced throughout every stage of growth.<hr style=" text-decoration: none;"><h2 id="key-takeaway">Key Takeaway</h2>CalMag is one of the simplest and most effective ways to strengthen your plants.It keeps nutrients balanced, supports photosynthesis, and prevents some of the most common deficiencies that can slow growth or hurt yield.While not all CalMag products include iron, a formula like Cronk Nutrients CalMag (2-0-0) gives your plants a complete dose of secondary nutrition &#x2014; ensuring lush, green growth from root to canopy.<script type="application/ld+json">
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What Does CalMag Do for Plants?

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