Your container size really depends on what you’re growing and how big the plant is.
(Typically, growers allow one gallon per one foot of assumed finished plant height in peat mix or coco coir pith.)
Keep in mind that as long as there’s support to keep the plant upright and space for the roots and stems to grow, pots can be as small as three inches (7.5cm). For larger, more water hungry plants, like tomatoes or peppers, it’s best to use at least a three-gallon container. The smaller container, the more frequent the watering.
1. The list price, also known as the manufacturer's suggested retail price (MSRP), or the recommended retail price (RRP), of a product is the price at which the manufacturer recommends that the retailer sell the product. The price set out or referred to herein is a recommended price only and there is no obligation to comply with the recommendation. Actual dealer price will vary.
2. Coco coir pith containing high salt levels and/or untreated with magnesium and calcium.
3. Trichoderma Harzianum.
4. Expanded clay produced in densities less than 430kg/m3.