Early Vegetative
- pH range
- 5.5-6.0
- EC reference
- 800-1200
- Light Cycle for Photo Period
- 18 / 6
- Light Cycle for Auto Period
- 12 / 12, 18 / 6 or 24 / 0
- Humidity
- 70%-60%
Nutrients and solution management
Feed the system. Control the solution.
RootBox Hydro Formula 420 is a professional 3-part nutrient system designed for high-performance hydroponic cultivation.
Nutrients family
Complete nutrition for every stage of plant growth.
Each formula works in harmony to deliver precise macro and micro nutrients across all growth stages from seedling to harvest.
Nutrient set
RootBox Hydro Formula 420 Nutrient Set (A+B+C)
Formula 420 A+B+C nutrient set.
Package sizes
500 ml1000 ml5000 ml
Formula 420
RootBox Hydro Formula 420 Part A
Formula 420 Part A nutrient product.
Package sizes
500 ml1000 ml5000 ml
Formula 420
RootBox Hydro Formula 420 Part B
Formula 420 Part B nutrient product.
Package sizes
500 ml1000 ml5000 ml
Formula 420
RootBox Hydro Formula 420 Part C
Formula 420 Part C nutrient product.
Package sizes
500 ml1000 ml5000 ml
Silicate
RootBox Hydro Pro Silicate
Silicate product in the RootBox Hydro Nutrients family.
Package sizes
500 ml1000 ml5000 ml
pH control
RootBox Hydro pH Perfect Up
pH up product in the RootBox Hydro Nutrients family.
Package sizes
500 ml1000 ml5000 ml
pH control
RootBox Hydro Perfect pH Down
pH down product in the RootBox Hydro Nutrients family.
Package sizes
500 ml1000 ml5000 ml
Nutrient calculator
Calculate your full-cycle nutrient needs.
Estimate the total Formula 420 and Pro Silicate volume for a complete growing cycle based on your system volume and extended schedule.
Step 1 of 2
Formula 420 feeding estimate
System selection
Which RootBox Hydro systems do you use?
Select the quantity of each system in your grow setup.
RootBox Hydro DWC System
1 plant site
RootBox Hydro RDWC 4+1 System
4 plant sites
RootBox Hydro RDWC +2 Expansion Pack
Requires at least one RDWC 4+1 System
Dosage and conditions
Dosage and Conditions Chart
Follow weekly nutrient dosages alongside the recommended solution and environmental conditions for every growth period.
Feeding program
RootBox Hydro Nutrients
Dosage: ml/L
| NutrientName | Early Vegetative | Full Vegetative | Early Flowering | Full Flowering | Flush | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Week 1 | Week 2 | Week 3 | Week 4 | +1 WeekRepeat | Week 1 | Week 2 | Week 3 | Week 4 | +1 WeekRepeat | Last Week | |
| Formula 420 Part A | 0.5 ml | 1 ml | 1.5 ml | 1.5 ml | 2 ml | 1.5 ml | 1.5 ml | 1.5 ml | 1.5 ml | 1.5 ml | 0 ml |
| Formula 420 Part B | 0.5 ml | 1.5 ml | 1.5 ml | 2 ml | 3 ml | 1.5 ml | 1.5 ml | 1.5 ml | 1.5 ml | 1.5 ml | 0 ml |
| Formula 420 Part C | 0.5 ml | 1 ml | 1 ml | 1 ml | 1 ml | 2 ml | 2 ml | 2 ml | 2 ml | 2 ml | 0 ml |
| Pro Silicate | 0 ml | 1 ml | 1 ml | 1 ml | 1 ml | 0 ml | 0 ml | 0 ml | 0 ml | 0 ml | 0 ml |
Period
Early Vegetative
| Nutrient | Week 1 | Week 2 |
|---|---|---|
| Formula 420 Part A | 0.5 ml | 1 ml |
| Formula 420 Part B | 0.5 ml | 1.5 ml |
| Formula 420 Part C | 0.5 ml | 1 ml |
| Pro Silicate | 0 ml | 1 ml |
- pH range
- 5.5-6.0
- EC reference
- 800-1200
- Light Cycle for Photo Period
- 18 / 6
- Light Cycle for Auto Period
- 12 / 12, 18 / 6 or 24 / 0
- Humidity
- 70%-60%
Nutrient solution
20-22 C
Temperature
Grow environment
24-28 C
Temperature