Cronk Micro 5-0-1 | Base Fertilizer with Calcium & Iron
500mL
$10.88
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Cronk Micro 5-0-1 | Base Fertilizer with Calcium & Iron
$10.88
NPK Ratio:
5-0-1
Product Overview
Micro 5-0-1 is the foundational nutrient in the Cronk Classic 3-Part system, delivering essential calcium, iron, and trace minerals that enable plants to utilize nitrogen, phosphorus, and potassium from other fertilizers. Without adequate micronutrients, plants cannot access macronutrients regardless of availability.
Micronutrient deficiencies cause stunted growth, yellowing leaves, and poor yields even when NPK levels appear sufficient. Micro prevents these issues by supplying chelated iron, calcium, manganese, zinc, copper, boron, and molybdenum in plant-available forms that remain stable across pH ranges 4.0-6.5.
Key Benefits
- Provides complete micronutrient spectrum for enzyme activation and chlorophyll production
- Chelated iron (EDTA) prevents precipitation and stays available in hydroponic reservoirs
- Calcium strengthens cell walls and supports nutrient transport throughout the plant
- Works from seedling through harvest in the same 3-part system
Ideal For
Growers using the Classic 3-Part system in soil, coco coir, or hydroponic setups who want professional-grade nutrition with precise ratio control at every growth stage.
What's Inside
Guaranteed Analysis: 5-0-1
| Total Nitrogen (N) | 5% |
| Soluble Potash (K₂O) | 1% |
| Calcium (Ca) | 5.0% |
| Iron (Fe) (Chelated) (Chelated) | 0.1% |
| Manganese (Mn) (Chelated) (Chelated) | 0.1% |
| Boron (B) | 0.01% |
| Copper (Cu) (Chelated) (Chelated) | 0.01% |
| Molybdenum (Mo) | 0.0008% |
| Zinc (Zn) (Chelated) (Chelated) | 0.015% |
Derived From:
Ammonium Molybdate, Ammonium Nitrate, Calcium Carbonate, Calcium Nitrate, Copper EDTA, Iron EDTA, Manganese EDTA, Potassium Borate, Potassium Nitrate, and Zinc EDTA
How To Use
Micro 5-0-1
Part of Cronk Nutrients 3-Part Base system and is recommended to be used with Grow and Bloom. Provides essential chelated micronutrients, calcium, and nitrogen to establish a strong foundation for plant growth. Use with every feeding throughout the entire grow cycle.
- Mix in room temperature water (65-72°F / 18-22°C)
- CRITICAL: Always add Micro FIRST, then Grow, then Bloom to prevent nutrient precipitation
- Use with every feeding from seedling through harvest
- Start with lower dosages for seedlings and gradually increase as plants mature
- If using Armadillo Armour, add it before Micro
- Never use Micro alone - always use with Grow and Bloom
- For specific dosages and week-by-week schedule, see Feed Schedules section
⚠️ Mixing Order: Armadillo (if using) → Micro (FIRST) → Grow → 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
Micro 5-0-1 Feed Schedule
Week-by-week dosage for Micro. Always add Micro first when using 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 | 5.0 mL | 1.32 mL |
| Week 4 | 5.0 mL | 1.32 mL |
| Week 5 | 5.0 mL | 1.32 mL |
| Week 6 | 2.5 mL | 0.66 mL |
| Week 7 | 4.0 mL | 1.06 mL |
| Week 8 | 1.25 mL | 0.33 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 does Micro do for my plants?
Micro provides the essential micronutrients and calcium your plants need for healthy growth, strong stems, and vibrant color. It acts as the foundation of the Classic 3-Part system and supports your plants from seedling to harvest.
When should I use Micro?
Micro is used during every stage of the grow. It stays in your feeding schedule from start to finish to keep your nutrient balance stable.
Do I mix Micro first?
Yes — Micro must always be added first so its chelated minerals stay stable in solution. The only exception is when you’re using silica, which goes in before everything.
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.
Can I run Micro by itself?
No—use Micro with Grow in veg and add Bloom in flower for complete nutrition.
Is Micro compatible with my setup?
Yes—works in soil, coco, and hydro/DWC, indoors or outdoors.
Is Micro good for vegetables, herbs, and houseplants?
Absolutely—great for tomatoes, peppers, leafy greens, and herbs; for houseplants, start at ¼–½ strength and increase only as needed.
Any quick tips to avoid issues?
Add products one at a time, never mix concentrates together, stir between additions, and always adjust pH last.
Complete Your System
Add these essential products for optimal results throughout your grow.
2-1-6
Grow 2-1-6: Veg Stage Formula
High potassium for strong stems and lush foliage during vegetative growth.
- Optimized for vegetative growth
- High potassium for strong stems
- Balanced nitrogen for lush foliage
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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
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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
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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.