Cronk Grow 2-1-6 | Vegetative Stage Plant Fertilizer
500mL
$10.88
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Cronk Grow 2-1-6 | Vegetative Stage Plant Fertilizer
$10.88
NPK Ratio:
2-1-6
Product Overview
Grow 2-1-6 is a vegetative-stage fertilizer designed to build strong stems, healthy leaves, and robust root systems before flowering begins. The potassium-forward formula supports over 60 enzyme systems involved in protein synthesis and photosynthesis while providing balanced nitrogen for controlled, productive growth.
Weak vegetative growth limits flowering potential. Plants that fail to develop sturdy architecture during veg cannot support heavy flower production later. Grow establishes the structural foundation that determines final yield capacity.
Key Benefits
- Elevated potassium (6%) strengthens cell walls and regulates water uptake for sturdy stems
- Balanced nitrogen (2%) supports leaf expansion without excessive stretch
- Phosphorus (1%) drives root development that supports the entire lifecycle
- Fully soluble formula works in soil, coco coir, and hydroponic systems
Ideal For
Growers using the Classic 3-Part system who want precise control over vegetative nutrition. Adjust Grow-to-Bloom ratios as plants transition to flowering for optimized stage-specific feeding.
What's Inside
Guaranteed Analysis: 2-1-6
| Total Nitrogen (N) | 2.0% |
| Available Phosphorus (P₂O₅) | 1.0% |
| Soluble Potash (K₂O) | 6.0% |
| Magnesium (Mg) | 0.5% |
Derived From:
Ammonium Phosphate, Magnesium Carbonate, Magnesium Nitrate, Magnesium Sulfate, Potassium Carbonate, Potassium Nitrate, Monopotassium Phosphate, and Potassium Sulfate
How To Use
Grow 2-1-6
Part of Cronk Nutrients 3-Part Base system and is recommended to be used with Micro and Bloom. Drives vigorous vegetative growth with nitrogen and potassium while promoting strong root development and structural growth. Use with every feeding throughout the grow cycle.
- Mix in room temperature water (65-72°F / 18-22°C)
- Add AFTER Micro has been thoroughly mixed into water
- Use with every feeding from seedling through harvest
- Higher dosages during vegetative stage support maximum structural growth
- Gradually taper dosage during flowering as nitrogen needs decrease
- Continue using through mid-flowering to support overall plant health
- For specific dosages and week-by-week schedule, see Feed Schedules section
⚠️ Mixing Order: Armadillo (if using) → Micro → Grow (2nd) → Bloom → Additives → Monkey Juice (LAST)
Basic Mixing Instructions
- Start with room temperature water (65-72°F / 18-22°C)
- If using Armadillo Armour, add it FIRST
- Add base nutrients in proper order and mix thoroughly
- Add CalMag after base nutrients (if applicable)
- Add other additives, with Monkey Juice LAST
- Check pH (5.6-6.4 depending on stage and medium)
- Apply to plants - water until 10-20% runoff
Customer Reviews
Feed Schedules & Dosage
Grow 2-1-6 Feed Schedule
Week-by-week dosage for Grow. Add after Micro in the 3-Part system.
Vegetative Stage
| Week | mL/Gallon | mL/Liter |
|---|---|---|
| Week 1 | 1.25 mL | 0.33 mL |
| Week 2 | 2.5 mL | 0.66 mL |
| Week 3 | 2.5 mL | 0.66 mL |
| Week 4 | 2.5 mL | 0.66 mL |
Flowering Stage
| Week | mL/Gallon | mL/Liter |
|---|---|---|
| Week 1 | 5.0 mL | 1.32 mL |
| Week 2 | 5.0 mL | 1.32 mL |
| Week 3 | 2.5 mL | 0.66 mL |
| Week 4 | 2.5 mL | 0.66 mL |
| Week 5 | 2.5 mL | 0.66 mL |
| Week 6 | 1.25 mL | 0.33 mL |
| Week 7 | 0.0 mL | 0.0 mL |
| Week 8 | 0.0 mL | 0.0 mL |
| Week 9 | 0.0 mL | 0.0 mL |
Compatibility
Compatible Plant Types
Hemp
Vegetables
Fruits
Flowers
Houseplants
High-Value Crops
Compatible Growing Mediums
Soil
Coco Coir
Hydroponics
Soilless Mixes
Compatible Irrigation Styles
Hand Watering
Drip Systems
AutoPot Systems
Bottom Feed
Recirculating Systems
Fertigation
General Mixing Tips
- Use room temperature water (65-72°F / 18-22°C)
- Mix each nutrient thoroughly before adding the next
- Never mix concentrated nutrients together
- Check and adjust pH after all nutrients are mixed
- Store nutrients in cool, dark place away from direct sunlight
Frequently Asked Questions
What is Grow (2-1-6) and what does it do?
It’s the vegetative part of the Classic 3-Part system, supplying N, K, Mg (plus P) to build strong stems and vigorous green growth.
Are Cronk Nutrients easy to use for beginners?
Yes—our nutrients are simple, stable, and forgiving. Each bottle lists clear mixing directions, and our feed charts make it easy to get started.
Are Cronk Nutrients safe for all types of plants?
Yes—our nutrients work great for vegetables, herbs, houseplants, and specialty crops alike. Each formula is balanced for strong, healthy growth in any garden.
When should I use Grow in the cycle?
Use heavily in veg; taper at transition and early bloom as plants shift to flowering.
What’s the correct mixing order with the 3-Part?
Add Micro first → Grow → Bloom; in RO water add CalMag first, wait 2–5 minutes, then add Micro → Grow. If using Armadillo Armour, it goes first.
Does Grow work in soil, coco, and hydro?
Yes—designed for all media and indoor/outdoor setups.
Is Grow suitable for vegetables, herbs, and houseplants?
Yes—great for tomatoes, peppers, leafy greens, and herbs; for houseplants, dilute to ¼–½ strength.
What pH/EC targets work best with Grow?
Aim for pH 6.2–6.8 (soil) and 5.8–6.2 (coco/hydro). Start at the feed-chart rate (or ½ strength for young plants) and adjust EC based on plant response.
Complete Your System
Add these essential products for optimal results throughout your grow.
5-0-1
Micro 5-0-1: Micronutrient Base
Essential calcium and chelated micronutrients for every feeding. The foundation of the 3-Part system.
- Complete micronutrient formula
- Chelated minerals for maximum absorption
- Essential for all growth stages
From $10.88
0-5-3
Bloom 0-5-3: Flower Formula
Zero nitrogen, high phosphorus for maximum bud development and resin production.
- Flowering stage formula
- High phosphorus for bud development
- Zero nitrogen prevents stretch
From $10.88
2-0-0
CalMag 2-0-0: Cal-Mag + Iron
Essential calcium, magnesium, and iron for coco coir, RO water, and LED grows.
- Calcium and magnesium supplement
- Prevents common deficiencies
- Essential for coco coir grows
From $12.88
Complete Kit
Save 4%
Save with the Complete Kit
Get everything you need in one package and save up to 15%.
3-Part Kit - Micro, Grow, Bloom
Complete 3-part base nutrient system with Micro, Grow, and Bloom. Professional plant nutrition for all growth stages and systems.
- Complete 3-Part Base System
- Adjustable Stage Ratios
- Professional Grade
$29.64
$28.16
Legal Disclaimer
Important Information for Our Customers
At Cronk Nutrients, we are committed to providing high-quality liquid plant fertilizers suitable for a variety of horticultural applications. Our products are designed for legal and responsible use by home growers and gardening enthusiasts. We do not condone or promote the use of our products for illegal purposes.
Customers are responsible for adhering to their local and state laws regarding plant cultivation. It is the sole responsibility of the customer to ensure compliance with all applicable laws and regulations. Cronk Nutrients will not be liable for any misuse of our products in violation of any laws.
By purchasing our products, the customer acknowledges their obligation to comply with the legal standards set forth in their jurisdiction and agrees to use our products in accordance with these laws. Cronk Nutrients reserves the right to refuse service to anyone suspected of using our products for illegal cultivation.
Thank you for choosing Cronk Nutrients for your plant nutrition needs. Grow with confidence, grow legally.