DIY Coco A/B Nutrient System β Complete Grow Guide
This document describes how to replicate a Canna Coco-style nutrient system using raw fertilizer salts and rainwater in a drainβtoβwaste coco setup.
-------------------------------------------------- SYSTEM OVERVIEW -------------------------------------------------- Water source: Rainwater (treated like RO) Medium: Coco coir System: Drain-to-waste Target dosing: 30 mL Part A + 30 mL Part B per 10 L of water Stock strength: 333Γ
Coco binds calcium and magnesium. Therefore calcium is supplied heavily and isolated in Part A.
-------------------------------------------------- SHOPPING LIST (one 12βweek grow) -------------------------------------------------- Calcium nitrate β 2 kg Potassium nitrate β 1 kg Monopotassium phosphate (MKP) β 1 kg Magnesium sulfate (Epsom salt) β 1 kg Iron DTPA (11%) β 100 g Micronutrient mix β 100 g
-------------------------------------------------- TARGET NUTRIENT PROFILES -------------------------------------------------- VEG (EC ~1.7) N 170 ppm P 50 ppm K 220 ppm Ca 180 ppm Mg 60 ppm
BLOOM (EC ~1.8) N 120 ppm P 65 ppm K 280 ppm Ca 180 ppm Mg 60 ppm
VEG β PART A (per 1 liter of stock): Calcium nitrate β 327 g Iron DTPA β 7.7 g
VEG β PART B (per 1 liter of stock): Potassium nitrate β 207 g MKP β 70 g Magnesium sulfate β 167 g Micronutrient mix β 8.3 g
BLOOM β PART A: Same as Veg Part A
BLOOM β PART B (per 1 liter of stock): Potassium nitrate β 140 g MKP β 100 g Magnesium sulfate β 167 g Micronutrient mix β 8.3 g
-------------------------------------------------- HOW TO MIX STOCK -------------------------------------------------- Use warm distilled or rainwater. Fill container 70% full. Add salts one at a time, dissolving completely before adding the next. Top up to final volume. Label containers clearly A or B.
Never mix A and B concentrates together.
-------------------------------------------------- HOW TO FEED -------------------------------------------------- Mix 30 mL Part A + 30 mL Part B into 10 L of water. Target pH after mixing: 5.6β5.8
-------------------------------------------------- FEEDING BY POT SIZE (daily) -------------------------------------------------- 5 L pot: 0.5β1 L 10 L pot: 1β2 L 20 L pot: 2β4 L
-------------------------------------------------- NOTES -------------------------------------------------- Monitor runoff EC. If runoff rises more than 0.3 EC above feed, flush. This recipe matches Canna Coco closely in buffering and mineral ratios.
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