Cronk Nutrients – Autoflower Line Intermediate Feed Chart GuideUpdated 10 days ago
🌱 Program Overview
The Autoflower Line Intermediate Feed Program is designed for growers who want to push plant performance slightly beyond the Basic program while maintaining balanced, consistent nutrition.
This schedule provides increased nutrient strength for medium- to high-intensity lighting setups, using Bonnie for the vegetative stage and Clyde for the flowering stage.
CalMag is used throughout the cycle for calcium and magnesium support, while Bud Booster is applied 1–2 times per week during flower for enhanced bud density and overall yield.
Measurement Units: Milliliters (mL) per Gallon
Mixing Instructions
Start with clean, pH-balanced water (target 5.8–6.4 pH).
During Veg, use Bonnie + CalMag.
During Flower, switch to Clyde + CalMag + Bud Booster.
Add nutrients in this order:
Base Nutrient (Bonnie or Clyde)
CalMag
Bud Booster (1–2 times per week during Flower)
Stir thoroughly after each addition.
Recheck and adjust pH before watering.
Maintain water temperature between 68–72°F (20–22°C).
💡 Tip: Never mix Bonnie and Clyde together in the same solution — use only one base per growth stage.
Autoflower Intermediate Feed Schedule
Vegetative Phase (Bonnie)
| Week | Growth Stage | Bonnie (ml/gal) | Clyde (ml/gal) | CalMag (ml/gal) | pH Range | Notes |
|---|---|---|---|---|---|---|
| 1 | Seedling | 0.50 | 0 | 2 | 5.7–6.0 | Gentle start, avoid overwatering |
| 2 | Early Veg | 2 | 0 | 2 | 5.9–6.2 | Encourage root and leaf growth |
| 3 | Mid Veg | 3.5 | 0 | 4 | 5.9–6.2 | Strengthen structure |
| 4 | Late Veg | 5.5 | 0 | 4 | 5.9–6.3 | Prepare for flowering transition |
Flowering Phase (Clyde)
| Week | Growth Stage | Bonnie | Clyde (ml/gal) | CalMag (ml/gal) | Bud Booster (ml/gal) | pH Range | Notes |
|---|---|---|---|---|---|---|---|
| 1 | Pre-Flower | 0 | 10 | 5 | 4 | 6.0–6.4 | Transition to bloom stage |
| 2 | Early Flower | 0 | 12 | 5 | 4 | 6.0–6.4 | Begin flower formation |
| 3 | Mid Flower | 0 | 14 | 5 | 8 | 6.0–6.4 | Peak nutrient uptake |
| 4 | Mid Flower | 0 | 15 | 5 | 8 | 6.0–6.4 | Maintain dense bud growth |
| 5 | Late Flower | 0 | 15 | 5 | 8 | 6.0–6.4 | Enhance bloom density |
| 6 | Ripen | 0 | 8 | 0 | 8 | 6.0–6.4 | Reduce feed before flush |
| 7 | Flush | 0 | 0 | 0 | 0 | 6.0–6.4 | Flush with clean, pH-balanced water |
Mixing Example – 10 Gallons
To scale your feed, multiply the chart rate by 10.
Example – Veg Week 3:
Bonnie: 3.5 × 10 = 35 mL
CalMag: 4 × 10 = 40 mL
Example – Flower Week 2:
Clyde: 12 × 10 = 120 mL
CalMag: 5 × 10 = 50 mL
Bud Booster: 4 x 10 = 40 mL
Feeding Tips
Ideal for LED and CMH lighting setups.
Feed every watering or alternate with water if in soil.
Monitor pH regularly to ensure nutrient uptake.
Use Bud Booster only 1–2 times weekly during flowering.
Observe leaf color and tip burn to fine-tune dosage ±10–20%.
Optional Additives
Use Cronk Nutrients’ additives alongside your base program for improved quality and resilience:
Sticky Bandit: Boosts resin and terpene production during bloom.
Armadillo Armour: Provides silica for stronger stems and stress resistance.
Monkey Juice: Inoculates beneficial microbes for better nutrient uptake.
pH & EC Guidelines
Vegetative stage (Bonnie): pH 5.8–6.2 | EC 1.0–1.4
Flowering stage (Clyde): pH 6.0–6.3 | EC 1.4–1.8
Adjust slightly based on your growing medium (soil, coco, hydro).
The Autoflower Line Intermediate Feed Chart delivers balanced nutrition and stronger flower production for growers who want to level up from the Basic program.
Follow this schedule and you’ll see consistent, healthy growth and impressive yields from seed to harvest.