Create stock recipe for liquid

DIY Coco A/B Nutrient System – Complete Grow Guide

This document describes how to replicate a Canna Coco-style nutrient system using raw fertilizer salts and rainwater in a drain‑to‑waste 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: 333×

Coco binds calcium and magnesium. Therefore calcium is supplied heavily and isolated in Part A.

--------------------------------------------------
SHOPPING LIST (one 12‑week grow)
--------------------------------------------------
Calcium nitrate – 2 kg
Potassium nitrate – 1 kg
Monopotassium phosphate (MKP) – 1 kg
Magnesium sulfate (Epsom salt) – 1 kg
Iron DTPA (11%) – 100 g
Micronutrient mix – 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

--------------------------------------------------
STOCK SOLUTION FORMULAS
--------------------------------------------------

VEG – PART A (per 1 liter of stock):
Calcium nitrate – 327 g
Iron DTPA – 7.7 g

VEG – PART B (per 1 liter of stock):
Potassium nitrate – 207 g
MKP – 70 g
Magnesium sulfate – 167 g
Micronutrient mix – 8.3 g

BLOOM – PART A:
Same as Veg Part A

BLOOM – PART B (per 1 liter of stock):
Potassium nitrate – 140 g
MKP – 100 g
Magnesium sulfate – 167 g
Micronutrient mix – 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: 5.6–5.8

--------------------------------------------------
FEEDING BY POT SIZE (daily)
--------------------------------------------------
5 L pot: 0.5–1 L
10 L pot: 1–2 L
20 L pot: 2–4 L

Always achieve 10–20% runoff.

--------------------------------------------------
WEEKLY SCHEDULE
--------------------------------------------------
Weeks 1–2: Veg EC 1.3–1.5
Weeks 3–5: Veg EC 1.6–1.8
Week 6: Transition EC 1.6
Weeks 7–10: Bloom EC 1.7–1.9
Weeks 11–12: Bloom EC 1.5 taper

Flush last 5–7 days with rainwater only.

--------------------------------------------------
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.