Learn how bloom boosters enhance bud size, density, and yield. Discover when to use Cronk Nutrients Bud Booster, ideal pH ranges, mixing instructions, and expert grower tips.

<h2 style=" text-decoration: none;" id="overview">Overview</h2>The flowering phase is when your plants put their energy into producing dense, resin-rich buds. To reach their full potential, they need extra support&#x2014;especially with phosphorus (P) and potassium (K), two critical nutrients that drive flower formation, size, and quality.This guide explains the science behind bloom boosters, when and how to use them, and how <a href="https://www.cronknutrients.com/collections/shop-all-fertilizer/products/bud-booster-bigger-buds-and-increased-yields?variant=47700565950775" target="_blank" rel="noopener noreferrer">Cronk Nutrients Bud Booster 0-1-3</a> fits into your feeding schedule. Whether you&#x2019;re growing in soil, coco coir, or hydroponics, understanding bloom nutrition will help you achieve heavier, healthier harvests.<a href="https://youtu.be/rWt76c53pic?si=jiRCyNej7dV9igfH" target="_blank" rel="noopener noreferrer"><img src="https://attachments.gorgias.help/0e8PW74oXnN2DnpG/hc/JEmYL2naJZy6oMgQ/2025101314-2925296b-c5ad-4dc6-8172-596ae63a84f0-bud%20booster%200-1-3%20mixing%20101%20thumbnail.png" style="width: 692px;" class="fr-fic fr-dib" alt="How to Use a Bloom Booster to Increase Bud Size and Yield"></a>&#x1F3A5; Watch the full video guide: <a href="https://youtu.be/rWt76c53pic?si=jiRCyNej7dV9igfH">How to Mix and Use Bud Booster</a><hr><h2 style=" text-decoration: none;" id="what-is-a-bloom-booster">What Is a Bloom Booster?</h2>A bloom booster is a nutrient supplement used during the flowering stage to increase bud size, density, and potency. These formulas are rich in phosphorus and potassium, nutrients essential for energy transfer, sugar formation, and flower development.Cronk Nutrients Bud Booster is designed with a precise 1:3 PK ratio, optimized to support the metabolic processes that power large, high-quality blooms. It also contains magnesium, amino acids, and trace elements that aid photosynthesis and strengthen overall plant health.Unlike standard base nutrients that focus on balanced growth, a bloom booster targets one specific goal &#x2014; helping your plant put more of its energy into flower production instead of vegetative growth.<hr><h2 style=" text-decoration: none;" id="the-science-behind-bloom-boosters">The Science Behind Bloom Boosters</h2><h3 style=" text-decoration: none;" id="phosphorus-p-the-flowering-catalyst">Phosphorus (P): The Flowering Catalyst</h3>Phosphorus plays a vital role in energy transfer (ATP synthesis), helping your plant convert nutrients into usable energy. During bloom, it promotes:<ul style=" text-decoration: none;"><li>Rapid flower initiation and bud site development</li><li>Root expansion for improved nutrient uptake</li><li>Enhanced sugar and carbohydrate synthesis (sweeter fruits, more resin)</li></ul><h3 style=" text-decoration: none;" id="potassium-k-the-quality-driver">Potassium (K): The Quality Driver</h3>Potassium regulates water and nutrient movement through plant tissues. It&#x2019;s key for:<ul style=" text-decoration: none;"><li>Thicker, denser buds</li><li>Stronger stems capable of supporting heavy flowers</li><li>Improved nutrient use efficiency and overall vigor</li></ul><h3 style=" text-decoration: none;" id="magnesium--amino-acids-the-supporting-cast">Magnesium &amp; Amino Acids: The Supporting Cast</h3>Magnesium drives photosynthesis by activating chlorophyll molecules, while amino acids help build the proteins and enzymes your plant needs for cell growth and stress resistance.Together, these elements form a powerful combination that increases bud size, density, and resin production without overloading the plant. <hr style=" text-decoration: none;"><h2 style=" text-decoration: none;" id="why-you-should-use-a-bloom-booster">Why You Should Use a Bloom Booster</h2>During the vegetative phase, plants focus on building structure. But when flowering begins, the plant&#x2019;s energy demands change dramatically. Phosphorus and potassium become more critical than nitrogen.Without proper supplementation, plants may show:<ul style=" text-decoration: none;"><li>Pale or fading leaves during bloom</li><li>Thin, underdeveloped buds</li><li>Reduced aroma, oil, or resin output</li></ul>Adding Bud Booster ensures your plants have a steady supply of PK energy during this high-demand phase. The result?&#x2705; Larger, denser flowers&#x2705; Better color and aroma expression&#x2705; Higher yields and improved crop consistencyEven in organic or living soil setups, bloom boosters can help replenish nutrients that become depleted during heavy flowering cycles.<hr style=" text-decoration: none;"><h2 style=" text-decoration: none;" id="how-to-use-bud-booster">How to Use Bud Booster</h2><h3 style=" text-decoration: none;" id="mixing-instructions">Mixing Instructions</h3><ol start="1" style=" text-decoration: none;"><li>Start with fresh, clean water (RO or filtered if possible).</li><li>Add 8 mL of Bud Booster per gallon of water, or 2 mL per liter.</li><li>Stir thoroughly until fully dissolved.</li><li>Always add Bud Booster after your base nutrients are mixed.</li></ol>&#x1F4A1; Pro Tip: Use separate pipettes or measuring cups for each product to prevent cross-contamination.<hr><h2 id="feeding-frequency">Feeding Frequency</h2>For most grow setups:<ul style=" text-decoration: none;"><li>Apply Bud Booster 1&#x2013;2 times per week during the flowering stage.</li><li>For lighter feeders or young bloomers, start at half strength (4 mL per gallon).</li><li>Gradually increase concentration as flowers develop and nutrient demand rises.</li></ul>This ensures a consistent PK supply without overwhelming your plants.<hr><h2 id="ph-targets-for-optimal-uptake">pH Targets for Optimal Uptake</h2>pH is the key to unlocking nutrient availability. After mixing, test and adjust your solution to these ranges:<table style="text-decoration: none; width: 100%;" id="isPasted"><thead><tr><th style="text-align: center;">Grow Medium</th><th style="text-align: center;">Ideal pH Range</th></tr></thead><tbody><tr><td style="text-align: center;">Soil</td><td style="text-align: center;">6.0 &#x2013; 7.0</td></tr><tr><td style="text-align: center;">Coco Coir</td><td style="text-align: center;">5.5 &#x2013; 6.5</td></tr><tr><td style="text-align: center;">Hydroponics</td><td style="text-align: center;">5.5 &#x2013; 6.2</td></tr></tbody></table>Maintaining proper pH ensures your plants absorb phosphorus and potassium efficiently, which directly affects flower size and structure.<hr> <h2 style=" text-decoration: none;" id="timing-when-to-start-and-stop-using-bud-booster">Timing: When to Start and Stop Using Bud Booster</h2><h3 style=" text-decoration: none;" id="when-to-start">When to Start</h3>Introduce Bud Booster as soon as you see the first signs of flower formation&#x2014;typically one week after the light cycle flips in photoperiod plants, or at week 3&#x2013;4 for autoflowers.Starting early provides the PK foundation your plants need to form strong bud sites before the heavy bloom phase.<h3 style=" text-decoration: none;" id="when-to-stop">When to Stop</h3>You can continue using Bud Booster until roughly the final two weeks before harvest, then switch to plain water to flush residual nutrients and improve final taste and aroma.<hr><h2 style=" text-decoration: none;" id="advanced-grow-tips">Advanced Grow Tips</h2><ul style=" text-decoration: none;"><li>Mixing Order Matters: Always add Bud Booster after base nutrients, but before additives like Sticky Bandit or CalMag.</li><li>Combine Strategically: Pair Bud Booster with Sticky Bandit to boost terpene and resin production during late bloom.</li><li>Monitor EC/PPM: Keep your nutrient strength between 1.8&#x2013;2.2 EC during peak flowering to avoid salt buildup.</li><li>Avoid Overuse: More isn&#x2019;t always better &#x2014; high PK levels can lock out other essential nutrients like calcium and magnesium.</li></ul><hr><h2 style=" text-decoration: none;" id="troubleshooting-common-bloom-issues">Troubleshooting Common Bloom Issues</h2><table style="text-decoration: none; width: 100%;" id="isPasted"><thead><tr><th style="text-align: center;">Issue</th><th style="text-align: center;">Likely Cause</th><th style="text-align: center;">Solution</th></tr></thead><tbody><tr><td style="text-align: center;">Pale or yellow leaves mid-flower</td><td style="text-align: center;">Low magnesium or pH imbalance</td><td style="text-align: center;">Add CalMag; check pH levels</td></tr><tr><td style="text-align: center;">Small, airy buds</td><td style="text-align: center;">Insufficient PK or weak lighting</td><td style="text-align: center;">Increase Bud Booster dosage slightly; verify light intensity</td></tr><tr><td style="text-align: center;">Nutrient burn (leaf tips brown)</td><td style="text-align: center;">Overfeeding</td><td style="text-align: center;">Flush with clean water; reduce feed strength by 25%</td></tr><tr><td style="text-align: center;">Weak aroma or flavor</td><td style="text-align: center;">Lack of carbohydrates</td><td style="text-align: center;">Add Sticky Bandit or another carb additive</td></tr></tbody></table><hr> <h2 style=" text-decoration: none;" id="summary">Summary</h2>Using a bloom booster is one of the simplest and most effective ways to push your plants toward their full flowering potential. By supplementing with phosphorus, potassium, and supporting elements, you provide the resources your plants need to develop dense, resinous buds with superior flavor and yield.Cronk Nutrients Bud Booster is designed for flexibility &#x2014; use it in any system, at any scale, and alongside your preferred nutrient base for consistent results.&#x1F3A5; Watch the full tutorial video: <a href="https://youtu.be/rWt76c53pic?si=jiRCyNej7dV9igfH">Bud Booster Mixing &amp; Feeding Guide</a>&#x1F4E7; For support, contact: help@cronknutrients.com<script type="application/ld+json">
{
 "@context": "https://schema.org",
 "@graph": [
 {
 "@type": "Organization",
 "@id": "https://www.cronknutrients.com/#org",
 "name": "Cronk Nutrients",
 "url": "https://www.cronknutrients.com"
 },
 {
 "@type": "Article",
 "@id": "https://growers.cronknutrients.com/en-US/how-to-use-a-bloom-booster-to-increase-bud-size-and-yield-2648406#article",
 "headline": "How to Use a Bloom Booster to Increase Bud Size and Yield",
 "description": "A practical guide to bloom boosters—what they are, when to start, how to dose, target EC/PPM and pH, and how to avoid nutrient burn or lockout while maximizing flower density and resin.",
 "articleSection": [
 "What Is a Bloom Booster?",
 "When to Start a PK Booster",
 "How Much to Use",
 "EC/PPM and pH Targets",
 "Common Mistakes to Avoid",
 "Pro Tips for Bigger Buds"
 ],
 "author": { "@id": "https://www.cronknutrients.com/#org" },
 "publisher": { "@id": "https://www.cronknutrients.com/#org" },
 "mainEntityOfPage": "https://growers.cronknutrients.com/en-US/how-to-use-a-bloom-booster-to-increase-bud-size-and-yield-2648406",
 "inLanguage": "en-US",
 "datePublished": "2025-10-15T08:00:00-05:00",
 "dateModified": "2025-10-15T08:00:00-05:00",
 "about": [
 "bloom booster",
 "PK booster",
 "flowering nutrition",
 "cannabis growing",
 "hydroponics"
 ],
 "keywords": [
 "bloom booster guide",
 "PK booster timing",
 "increase bud size",
 "flowering EC PPM targets",
 "avoid nutrient burn",
 "cannabis bloom nutrients",
 "Cronk Nutrients"
 ],
 "mentions": [
 { "@id": "https://growers.cronknutrients.com/en-US/how-to-use-a-bloom-booster-to-increase-bud-size-and-yield-2648406#video" },
 { "@id": "https://growers.cronknutrients.com/en-US/how-to-use-a-bloom-booster-to-increase-bud-size-and-yield-2648406#howto" }
 ]
 },
 {
 "@type": "VideoObject",
 "@id": "https://growers.cronknutrients.com/en-US/how-to-use-a-bloom-booster-to-increase-bud-size-and-yield-2648406#video",
 "name": "How to Use a Bloom Booster (Cronk Nutrients)",
 "description": "Step-by-step video on when and how to add a PK bloom booster for denser buds and higher yields while avoiding burn or lockout.",
 "thumbnailUrl": [
 "https://i.ytimg.com/vi/rWt76c53pic/hqdefault.jpg"
 ],
 "uploadDate": "2025-10-10T12:00:00-05:00",
 "embedUrl": "https://www.youtube.com/embed/rWt76c53pic",
 "contentUrl": "https://youtu.be/rWt76c53pic",
 "publisher": { "@id": "https://www.cronknutrients.com/#org" }
 },
 {
 "@type": "HowTo",
 "@id": "https://growers.cronknutrients.com/en-US/how-to-use-a-bloom-booster-to-increase-bud-size-and-yield-2648406#howto",
 "name": "How to Use a Bloom Booster",
 "description": "Recommended timing, dose ranges, and EC/pH targets to safely add a PK bloom booster for bigger buds.",
 "inLanguage": "en-US",
 "totalTime": "PT5M",
 "supply": [
 { "@type": "HowToSupply", "name": "Bloom booster (PK supplement)" },
 { "@type": "HowToSupply", "name": "Base nutrients" },
 { "@type": "HowToSupply", "name": "Clean water" }
 ],
 "tool": [
 { "@type": "HowToTool", "name": "Measuring syringe or scale" },
 { "@type": "HowToTool", "name": "EC/TDS meter" },
 { "@type": "HowToTool", "name": "pH meter" }
 ],
 "step": [
 {
 "@type": "HowToStep",
 "name": "Start at early bloom",
 "text": "Begin adding a bloom booster at early flower (post-stretch) when bud sites are set."
 },
 {
 "@type": "HowToStep",
 "name": "Dose low, then adjust",
 "text": "Start at a low dose per label; increase gradually if plants show strong uptake. Avoid jumping to max dose immediately."
 },
 {
 "@type": "HowToStep",
 "name": "Mix after base nutrients",
 "text": "Add base nutrients first, then the bloom booster to agitated water. Mix thoroughly to prevent precipitation."
 },
 {
 "@type": "HowToStep",
 "name": "Check EC/PPM and pH",
 "text": "Confirm solution stays within stage targets and set pH (~5.8–6.2 coco/hydro; ~6.2–6.8 soil)."
 },
 {
 "@type": "HowToStep",
 "name": "Monitor tips and runoff",
 "text": "Watch for tip burn or rising runoff EC. If either occurs, reduce dosage or increase runoff to manage salt buildup."
 }
 ]
 }
 ]
}
</script>

How to Use a Bloom Booster to Increase Bud Size and Yield

Have a question about feeding schedules, product use, or an order? Our grower support team is here to help.

Home 

Shop 

Feed Charts

Grower FAQ

Cronk Nutrients Growers Knowledge Hub

Boost flower and fruit production with Bud Booster 0-1-3. This bloom enhancer supports fuller flowers, stronger yields, and vibrant, healthy plants.

Bud Booster 0-1-3: Flower & Bloom Enhancer – Cronk Nutrients

Cronk Nutrient Lines

Additives & Boosters

Bud Booster 0-1-3 (Flower Enhancer)

Choosing the Right Cronk Nutrients for Your Grow

Understanding NPK: What Those Numbers on Your Fertilizer Really Mean

Liquid Nutrients vs. Dry Nutrients: Which Is Best for Your Grow?

What Does CalMag Do for Plants?

Nutrient Basics

Choosing the Right Grow Medium: Soil, Coco, or Hydroponics?

What Size Pots Should I Use for My Plants?

Grow Setup

Top 10 Beginner Grow Mistakes (and How to Avoid Them)

First Grow Tips

Getting Started

pH & Water Quality: Why Balance Matters

pH & Water Quality

Understanding EC & Nutrient Strength: A Grower’s Guide

EC & PPM in Organic vs Salt-Based Nutrition: What Every Grower Must Know

EC/PPM & Nutrient Strength

Understanding Grow Lights for Cannabis: A Beginner’s Guide

Growing Indoors vs. Outdoors: Which Is Best for Your Grow?

Light & Environment

The Science of Growing Vibrant Basil: Choosing the Right Medium, Nutrients & Microbes

The Best Pot Size and Growing Medium for Autoflowers: A Complete Grower’s Guide

Choosing the Right Grow Medium for Cannabis: Soil, Coco, or Hydro?

Grow Mediums & Systems

Photosynthesis & Carbohydrates: Powering Plant Growth and Fruit Quality

How Magnesium Powers Photosynthesis and Plant Growth

Unlock Your Plants’ Potential: Understanding Nitrogen, Phosphorus, and Potassium

The Science of Growing Beefsteak Tomatoes: From Seed to Harvest

The Science of Flowering Nutrition: Choosing the Best Fertilizer for Bloom Growth

Plant Science & Nutrition

Grow Science

Grow Guides

Cronk Nutrients – Classic Line Basic Feed Chart Guide

Mixing & Usage

Cronk Nutrients 3-Part Base Mixing Guide: Master Feeding for Maximum Growth

Product Guides

Classic Line

Cronk Nutrients – Autoflower Line Basic Feed Chart Guide

Cronk Nutrients – Autoflower Line Intermediate Feed Chart Guide

Cronk Nutrients – Autoflower Line Expert Feed Chart Guide

Bonnie & Clyde Mixing Guide: Autoflower Nutrients 101

Bonnie & Clyde (Autoflower Line)

Introducing PuurOrganics: A Cleaner Path to Organic Liquid Fertilizer Success

Cronk Nutrients – PuurOrganics Feed Chart Guidance

PuurOrganics

CalMag Mixing Guide: Strengthen Growth & Prevent Deficiencies

CalMag 2-0-0

Sticky Bandit Mixing Guide: Boost Terpenes, Flavor & Potency

Sticky Bandit 0-0-1 (Resin Enhancer)

Feeding Charts for Cronk Nutrients Lines

Feeding & Schedules

Cronk Nutrients SDS Sheets

SDS & Docs

Grower Resources

Grower Glossary – A

Grower Glossary – B

Grower Glossary – C

Grower Glossary – D

Grower Glossary – E

Grower Glossary – F

Grower Glossary – G

Grower Glossary – H

Grower Glossary – I

Grower Glossary – J

Grower Glossary – K

Grower Glossary – L

Grower Glossary – M

Grower Glossary – N

Grower Glossary – O

Grower Glossary – P

Grower Glossary – Q

Grower Glossary – R

Grower Glossary – S

Grower Glossary – T

Grower Glossary – U

Grower Glossary – V

Grower Glossary – W

Grower Glossary – X

Grower Glossary – Y

Grower Glossary – Z

Grower Terminology

What order should I mix Cronk Nutrients in?

When should I start feeding my plants Cronk Nutrients?

Can I mix all Cronk Nutrients together?

How often should I feed my plants Cronk Nutrients?

Do I need to use CalMag with Cronk Nutrients?

Which Cronk Nutrient system should I use for my grow?

Can I use Cronk Nutrients with other brands?

Can I use Cronk Nutrients in DWC or hydroponics?

Can I use Sticky Bandit and CalMag with PuurOrganics?

Is there anything else I should buy to help my plants thrive?

How can I prevent nutrient lockout when feeding my plants?

Can I use Cronk Nutrients in a drip irrigation or auto-watering system?

Can I foliar feed with Cronk Nutrients?

How do I transition from vegetative to flowering nutrients?

Should I use plain water between feedings?

Why are pH and EC important in plant growth?

Feeding & Mixing FAQ

Why are my plant leaves turning yellow?

Why are my leaves curling up or down?

My plants have brown spots on the leaves—what’s happening?

Why is my plant’s growth uneven or stunted?

Why are my buds small and airy?

My plants look pale even though I’m feeding—what’s wrong?

Why are my plants drooping after watering?

My pH keeps fluctuating — how do I fix it?

Why are my stems purple or red?

Troubleshooting & Deficiencies

How should I store Cronk Nutrients?

Can I store Cronk Nutrients in my garage or shed?

Can Cronk Nutrients go bad if not used for months?

What is the shelf life of Cronk Nutrients?

How long can I store pre-mixed Cronk Nutrient solution?

Storage & Product Safety

Is there a feed chart for Cronk Nutrients?

How do I know which Cronk Nutrients feeding chart to use?

How do I measure nutrients accurately for my grow?

What EC and PPM levels should I target with Cronk Nutrients?

How can I adjust Cronk Nutrients feed charts for smaller or larger plants?

How do I use Cronk Nutrients in coco coir vs. soil?

Do I need to flush when using Cronk Nutrients?

Can I use Cronk Nutrients with compost teas or organic boosters?

How do I convert Cronk Nutrient dosages from liters to gallons?

What do the numbers mean on the Cronk Nutrients feed charts?

Feeding Charts & Measurements

What products does Cronk Nutrients offer?

Can I use Cronk Nutrients on non-autoflowering plants?

Can I use Cronk Nutrients on any type of plant?

What do the numbers on the bottles mean?

General Product FAQ

What should I do if my package is delayed or tracking hasn’t updated?

Can I get a discount code for Cronk Nutrients?

How can I apply for a Cronk Nutrients sponsorship?

My Cronk Nutrients arrived frozen — what should I do?

How long does it take for my Cronk Nutrients order to ship?

My tracking number says “Label Created” but hasn’t updated — what does that mean?