PuurOrganic Line
Take full control of your plant nutrition with the PuurOrganic Line, a modular system of five OMRI-certified concentrates. Adjust nitrogen, phosphorus, and potassium levels independently while ensuring complete calcium, magnesium, and micronutrient coverage. Build custom feeding programs or follow our proven schedules for any crop, any stage, any system.
- 100% organic ingredients
- Customizable N-P-K ratios
- Clean and sediment-free
- Compatible with all grow systems
The Complete System
The PuurOrganic Line gives you complete nutritional control with independent N-P-K management and comprehensive micronutrient support. Adjust nitrogen, phosphorus, and potassium levels to match your plants' changing needs while ensuring structural integrity and trace element availability from seedling to harvest.
Organic Nitrogen
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PuurNitro
NPK: 8-0-0
Fast-acting organic nitrogen for vigorous vegetative growth and lush green foliage. Fully soluble and sediment-free for all systems.
- Promotes vigorous vegetative growth and vibrant green foliage
- Sustainably sourced organic nitrogen
- Fully soluble and sediment-free formula safe for all irrigation systems
- OMRI certified for organic production in all growing mediums
Available Sizes:
500mL
1L
4L
10L
20L
208L
1000L
Organic Phosphorus
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PuurPhos
NPK: 0-12-0
Concentrated organic phosphorus for explosive root development and flowering. Clean, sediment-free formula for all systems.
- Drives explosive root development and flowering initiation
- Sustainably sourced organic phosphorus
- Sediment-free and fully soluble for all growing systems
- OMRI certified for bloom phases and deficiency correction
Available Sizes:
500mL
1L
4L
10L
20L
208L
1000L
Organic Potassium
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PuurK
NPK: 0-0-15
High-potency organic potassium for bloom density and plant strength. Fully soluble for all systems and foliar feeding.
- Maximizes flower density, weight, and late-stage plant strength
- Sustainably sourced organic potassium
- Fully soluble and sediment-free formula safe for all systems
- OMRI certified for ripening, quality enhancement, and stress resistance
Available Sizes:
500mL
1L
4L
10L
20L
208L
1000L
Organic Micro & Macros
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PuurBalance
NPK: 2-0-0
Complete micronutrient formula with 21 L-amino acids. Enhanced uptake, stress resistance, and plant vitality for all stages.
- Delivers essential micronutrients and chelated macros for complete nutrition
- Built on 21 L-amino acids for superior absorption and stress resistance
- Fully soluble and sediment-free for soil, coco, drip system, and foliar use
- Enhances nutrient efficiency and supports healthy growth in all stages
Available Sizes:
500mL
1L
4L
10L
20L
208L
1000L
Organic Calcium & Magnesium
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PuurCalMag
NPK: 0-0-0
Essential calcium and magnesium to prevent deficiencies and strengthen structure. Fast-absorbing formula critical for coco and RO systems.
- Prevents common calcium and magnesium deficiencies in all systems
- Sustainably sourced mineral nutrition
- Chelated with organic acids for rapid absorption and bioavailability
- Essential for coco coir, RO water, and high-light growing environments
Available Sizes:
500mL
1L
4L
10L
20L
208L
1000L
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Application Guide
Complete organic feeding schedule for soil and soilless systems
PuurOrganics Feed Schedule
Complete 5-Part Organic Nutrient System
This kit includes five OMRI-certified organic nutrients designed to give you complete control over your N-P-K ratios throughout the entire grow cycle:
- PuurNitro (8-0-0) - Clean organic nitrogen for lush vegetative growth
- PuurPhos (0-12-0) - Organic phosphorus for explosive flowering and root development
- PuurK (0-0-15) - Potassium concentrate for ripening, density, and plant strength
- PuurCalMag - Calcium and magnesium supplement to prevent deficiencies
- PuurBalance (2-0-0) - Complete micronutrient blend with 21 L-amino acids
📅 Feeding Schedule:
- Feed once per week with the nutrient solution below
- Water with plain pH'd water in between nutrient feedings
- Adjust feeding frequency based on plant size, growth rate, and medium
Mixing Order: Always add PuurNitro first, then PuurPhos, then PuurK, then PuurCalMag, then PuurBalance. Stir thoroughly between each addition.
Vegetative Phase (Weeks 1-4)
Week / Stage
PuurNitro
(mL/gal)
PuurPhos
(mL/gal)
PuurK
(mL/gal)
PuurCalMag
(mL/gal)
PuurBalance
(mL/gal)
Week 1 - Seedling
PuurNitro: 2 mL/gal
PuurPhos: 2 mL/gal
PuurK: 5 mL/gal
PuurCalMag: 2 mL/gal
PuurBalance: 0.5 mL/gal
Week 2
PuurNitro: 3 mL/gal
PuurPhos: 2.5 mL/gal
PuurK: 6 mL/gal
PuurCalMag: 3 mL/gal
PuurBalance: 1 mL/gal
Week 3
PuurNitro: 5 mL/gal
PuurPhos: 3 mL/gal
PuurK: 6 mL/gal
PuurCalMag: 4 mL/gal
PuurBalance: 1 mL/gal
Week 4
PuurNitro: 7 mL/gal
PuurPhos: 3.5 mL/gal
PuurK: 8 mL/gal
PuurCalMag: 5 mL/gal
PuurBalance: 1.5 mL/gal
Flowering Phase (Weeks 1-10)
Week / Stage
PuurNitro
(mL/gal)
PuurPhos
(mL/gal)
PuurK
(mL/gal)
PuurCalMag
(mL/gal)
PuurBalance
(mL/gal)
Week 1
PuurNitro: 7 mL/gal
PuurPhos: 4 mL/gal
PuurK: 9 mL/gal
PuurCalMag: 5 mL/gal
PuurBalance: 2 mL/gal
Week 2
PuurNitro: 6 mL/gal
PuurPhos: 5 mL/gal
PuurK: 10 mL/gal
PuurCalMag: 5 mL/gal
PuurBalance: 2 mL/gal
Week 3
PuurNitro: 5 mL/gal
PuurPhos: 5 mL/gal
PuurK: 10 mL/gal
PuurCalMag: 5 mL/gal
PuurBalance: 2 mL/gal
Week 4
PuurNitro: 4 mL/gal
PuurPhos: 5 mL/gal
PuurK: 10 mL/gal
PuurCalMag: 5 mL/gal
PuurBalance: 2 mL/gal
Week 5
PuurNitro: 3 mL/gal
PuurPhos: 5 mL/gal
PuurK: 10 mL/gal
PuurCalMag: 5 mL/gal
PuurBalance: 2 mL/gal
Week 6
PuurNitro: 2 mL/gal
PuurPhos: 5 mL/gal
PuurK: 10 mL/gal
PuurCalMag: 5 mL/gal
PuurBalance: 2 mL/gal
Week 7
PuurNitro: 1 mL/gal
PuurPhos: 5 mL/gal
PuurK: 10 mL/gal
PuurCalMag: 4 mL/gal
PuurBalance: 2 mL/gal
Week 8
PuurNitro: - mL/gal
PuurPhos: 5 mL/gal
PuurK: 10 mL/gal
PuurCalMag: 2 mL/gal
PuurBalance: 2 mL/gal
Week 9 - Ripen
PuurNitro: - mL/gal
PuurPhos: 4 mL/gal
PuurK: 8 mL/gal
PuurCalMag: - mL/gal
PuurBalance: 1 mL/gal
Week 10 - Flush
PuurNitro: - mL/gal
PuurPhos: - mL/gal
PuurK: - mL/gal
PuurCalMag: - mL/gal
PuurBalance: - mL/gal
Feeding Schedule: Feed once per week with the nutrient solution above. Water with plain pH'd water between nutrient feedings. All measurements in mL per gallon (1 gallon = 3.79L).
Mixing Instructions
1
Start with Clean Water
Use room temperature water (18-22°C / 65-72°F) in a clean container. For best results, use filtered or dechlorinated water.
2
Add PuurNitro First
Add the recommended amount of PuurNitro to your water and stir thoroughly for 30 seconds. This provides the nitrogen foundation for plant growth.
3
Add PuurPhos Second
After PuurNitro is mixed, add PuurPhos and stir thoroughly for 30 seconds. This provides phosphorus for root and flower development.
4
Add PuurK Third
After PuurPhos is mixed, add PuurK and stir thoroughly for 30 seconds. This provides potassium for flowering and plant strength.
5
Add PuurCalMag Fourth
After PuurK is mixed, add PuurCalMag and stir thoroughly. This prevents calcium and magnesium deficiencies.
6
Add PuurBalance Last
Finally, add PuurBalance and stir thoroughly. This micronutrient blend enhances uptake of all other nutrients. Wait 1-2 minutes after mixing.
7
Check pH
Target pH: 6.2-6.8 for soil and soilless mediums. Organic nutrients naturally buffer pH, but always verify before feeding.
8
Apply to Plants
Feed once per week until you see 10-20% runoff. Water with plain pH'd water between nutrient feedings to prevent salt buildup.
PuurOrganics Pro Tips
- OMRI Certified Organic: All PuurOrganic products are certified organic and safe for use in organic growing systems
- Drip system compatible: All products are fully soluble and sediment-free, perfect for automated irrigation systems
- Weekly feeding schedule: Feed once per week with nutrients, water with plain pH'd water in between
- Customize your ratios: This 5-part system gives you complete control over N-P-K ratios at every stage of growth
- Works in all systems: Suitable for soil, soilless mixes, coco coir, living soil beds, and drip irrigation
- Storage: Store bottles in a cool, dark place. Shake well before each use for best results
Optional Additives
Boost your PuurOrganics feed program with these optional supplements:
Monkey Juice
Beneficial Bacteria
Add once per week throughout the entire grow cycle to boost beneficial microbes in the root zone and enhance nutrient availability.
Rate: 4 mL per gallon weekly
Armadillo Armour
Monosilicic Acid
Add once per week to strengthen plant cell walls, increase stress resistance, and improve nutrient uptake.
Rate: 0.5-1 mL per gallon weekly
Important: When using Armadillo Armour, always mix it in first before adding any other nutrients.
Want the Complete Feed Chart?
Download our detailed PuurOrganics feeding schedule with week-by-week instructions, optional additive schedules, and foliar spray applications for soil and soilless systems.
Compatible Additives
Enhance your results with our premium additives and supplements
Beneficial Bacteria
Monkey Juice
Beneficial bacteria that enhance soil health and boost nutrient availability.
- Contains Bacillus subtilis and Bacillus licheniformis for root zone health
- Improves nutrient uptake and soil structure
- Strengthens plant immunity against diseases and stress
Carbohydrates
Sticky Bandit 0-0-1
Carbohydrate supplement that fuels beneficial microbes and enhances terpene production.
- Boosts terpene and flavor profile
- Fuels plant growth and energy
- Supports root and microbe health
Monosilici Acid
Armadillo Armour
Monosilicic acid that strengthens cell walls and improves stress resistance.
- Delivers bioavailable silicon for stronger stems and leaves
- Enhances pest and disease resistance naturally
- Improves nutrient uptake and drought tolerance
Learn More
Watch our quick guides to get the most out of your nutrients
Frequently Asked Questions
Find answers to common questions
What is PuurOrganics?
PuurOrganics is a clean, liquid organic nutrient system made from upcycled plant and mineral sources. It delivers balanced nutrition without sediment or clogging
What makes PuurOrganics different?
Each formula is 100% soluble, sustainable, and precision-made for easy mixing and full nutrient control—no fillers, no buildup
How often should I feed?
Feed 1–2 times per week in soil or every watering in coco/hydro.
Can I mix all PuurOrganics products together?
Yes. All five products mix cleanly in one jug. Add in this order: PuurNitro → PuurPhos → PuurK → PuurCalMag → PuurBalance
What’s included in the PuurOrganics line?
Five key bottles: PuurNitro, PuurPhos, PuurK, PuurCalMag, and PuurBalance — a complete organic feed system
Is PuurOrganics sustainable?
Yes. The line is crafted with environmentally conscious ingredients and processes, supporting a cleaner, more sustainable way to grow
Is PuurOrganics safe for drip systems?
Yes. Every formula is crystal-clear and clog-free, making it ideal for drip lines, emitters, and irrigation systems
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.