Autoflowers are fast, efficient, and beginner-friendly—but they don’t leave much room for error when it comes to nutrients. That’s why we built a precise, simplified feeding chart just for them, using our 5-bottle PuurOrganics system.
Whether you’re growing one plant in a tent or filling out a bed, this guide shows you exactly how to feed week by week—with clean, organic nutrients designed for soil, coco, or hydroponics.
🧪 Why PuurOrganics Works So Well for Autos
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✅ Only 5 bottles to manage
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✅ Fully soluble, no sediment or clogging
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✅ Gentle but effective organic inputs (upcycled soy, pumpkin seeds, durian shells)
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✅ Customizable NPK control for short life cycles
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✅ Safe for small containers and living soil
With no synthetic salts, no burn risk, and complete compatibility with autoflower timing, this is organic fertilizer made for speed.
📊 Week-by-Week Autoflower Feeding Chart
(All measurements in mL per gallon)
|
Week |
Stage |
Nitro |
Phos |
K |
CalMag |
Balance |
Notes |
|
1 |
Seedling |
2 |
1 |
0 |
2 |
1 |
Light root support, no K needed |
|
2 |
Early Veg |
3 |
1 |
1 |
2 |
1 |
Light N & P, small K intro |
|
3 |
Late Veg / Pre-Flower |
4 |
3 |
3 |
4 |
3 |
Stretch begins, flower prep |
|
4 |
Transition |
3 |
3 |
4 |
4 |
1.5 |
Flower sites forming |
|
5 |
Early Flower |
2 |
3 |
5 |
4 |
1.5 |
Bud formation and early resin |
|
6 |
Mid Flower |
2 |
3 |
6 |
4 |
2 |
Bulk up phase |
|
7 |
Late Flower |
1 |
4 |
8 |
4 |
2 |
Peak bud weight |
|
8 |
Ripening Begins |
0.5 |
4 |
5 |
4 |
2 |
Begin nutrient fade |
|
9 |
Pre-Flush |
0 |
2 |
3 |
4 |
1 |
Last light feed |
|
10 |
Flush |
0 |
0 |
0 |
0 |
0 |
Water only |
🌿 Product Breakdown for Autoflower Success
PuurNitro (8-0-0)
👉 Use Weeks 1–7
Drives early vegetative growth without overloading the plant. Helps your auto get a strong, fast start.
PuurPhos (0-12-0)
👉 Use Weeks 1–9
Supports rooting, flower initiation, and trichome development. Essential for strong transitions and early flower stacking.
PuurK (0-0-15)
👉 Use Weeks 2–9
Potassium fuels flower density and late-stage resilience—especially important in small pots or coco setups.
PuurCalMag (2-0-0)
👉 Use Weeks 1–9
Keeps structure strong, especially in coco or RO water systems. Prevents Cal-Mag lockout as plants stack weight.
PuurBalance
👉 Use All Weeks Except Flush
Provides full-spectrum micros + 21 plant-based amino acids to improve uptake, boost immunity, and fuel photosynthesis.
💡 Autoflower Tips for Feeding Success
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🕒 Feed once per week, or split into 2 light feedings if using coco/hydro
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💧 Foliar spray in Weeks 1–3 with PuurBalance and PuurNitro for faster green-up
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⚖️ Watch your plant size—scale feeding slightly down in small pots (1-3 gallons)
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🚫 Never skip CalMag in coco or soft water
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🔄 Flush in Week 10 to clear excess and improve finish flavor
🔄 Mixing Order
- PuurNitro
- PuurPhos
- Puurk
- PuurCalMag, tip is to dilute the down into another cup of water first before adding it to the existing solution. Take the appropriate amount of CalMag and mix it into this separate cup of water and slowly pour it into the main solution.
- PuurBalance. ProTip: Skip this on feed and use once a week as a foliar spray at 2mL to 4mL per gallon.
✅ Why Growers Love PuurOrganics for Autos
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Clean, no-burn formulas
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Compatible with autoflower speed and timing
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Works in soil, coco, and hydro
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Fewer bottles, less guesswork
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Boosts flavor, trichomes, and smooth finish
📦 Get Started with the PuurOrganics Autoflower Bundle
🛒 Shop the Autoflower 5-Bottle Kit Now »
Everything you need. Nothing you don’t. Built for speed and simplicity.
