Pick the perfect pot size for every grow — rooted in science.
Cannabis Pot Size Calculator
Why Pot Size Matters
- Too small = root-bound plants, stunted growth
- Too large = overwatering risk, wasted nutrients
- Coco/hydro can use smaller containers due to more frequent irrigation
- Transplanting? Step up gradually (e.g. 1 gal → 3 gal → 5 gal)
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Pot Size FAQ
Q: Does grow medium affect pot size?
A: Yes! Soil typically needs larger pots than coco or hydroponics because it retains moisture longer and drains slower.
Q: Can I mix grow media?
A: Absolutely. Many growers mix coco with perlite or use soil with added rockwool cubes. Learn more in our Growing Media Guide.
Q: How do I know if I need to transplant?
A: If roots are circling the bottom of your pot or water runs through too quickly, it's time to size up.
Q: Can pot size affect yield?
A: Yes. Healthy root systems lead to better nutrient uptake and bigger, healthier plants — especially in longer veg times.
Tool by GrōHaus — helping you grow smarter, one pot at a time.