A 20L (or 20 liter) pot typically measures between 20-22cm (8-9 inches) in diameter and 25-30cm (10-12 inches) tall. This type of pot is exceptionally versatile because of its generous size which is perfect for a large variety of plants including shrubs, trees, and even vegetable gardens. A good rule of thumb is to go with the largest pot size that is practical for your gardening space. For example, if you have limited gardening space, a 20-inch terra cotta pot may be most practical choice.

I think the easiest way to work out the best pot size and plant numbers is to first look at what bulb you are using, and I'm using hps bulbs as my base and a 3ft x 3ft or 4ft x 4ft space, and whether plant numbers are a concern for you or just not practical Which is why I'm wondering if the 5L jump in pot size from a 15L pot to a 20L pot, will double the yield from 10oz to 20oz, or whether a 7L jump in pot size from a 15L pot to a 22L pot, will double the yield? Dimensions: 40.8cm diameter top, 29.8cm diameter base and 33cm depth. Internal top diameter 36cm. Capacity: 30 litres. If you are growing larger or taller varieties, such as jalapenos, you may need to go with a larger pot size of 24-30 inches. For the largest varieties, such as bell peppers, you may need a pot of size 36-48 inches. My head hurts now, I've been trying to find a formula that may or may not even exist, one that explains why certain jumps in pot size double the yield when they aren't doubling the amount of medium used.Multiply the height by the circumference and divide the result by two. Then, multiply this result by the depth of the pot to calculate the volume in cubic centimeters. The sizing is estimated but this will give a guideline and we have used a garden spade to show the scale reference Dimensions: 44cm diameter top, 31.8cm diameter base and 37cm depth. Internal top diameter 40cm. Capacity: 35 litres. Additionally, the depth of the 20L pot is beneficial for deep root growth, which is beneficial for getting the best results from your plants. How big is a plant in a 10 Litre pot? If using 4 plants then you would look for them to yield over 5oz/plant so then you would need at least an 11-15ltr if in compost but you would get away with 11ltr in coco. Coco tends to out yield compost by more when you get to the bigger pots. Training would mostly be used for smaller numbers to fill the canopy

Dimensions: 55cm diameter top, 41cm diameter base and 37.5cm depth. Internal top diameter 50cm. Capacity: 60 litres. They will be scrogged in Coco under a 1000 watt lamp with a Grostar reflector, like he usually uses. For example, if you have the height, width, and diameter of the pot the equation you will use is V = π/4 × D² H. This equation uses Greek pi (π) as 3.14. The size of the pot you’ll need to grow peppers will depend on the type of pepper plant you are growing and the amount of soil needed to provide the necessary nutritional requirements. Generally speaking, peppers require a minimum soil depth of 8-12 inches, so a pot that is at least 8-12 inches in depth is necessary. The first step to calculate pot size in litres is to calculate the volume of the pot in cubic centimeters. To do this, you will need the measurement of the pot’s three dimensions – height, diameter (or circumference) and depth.Our smaller plastic plant pots are excellent for sowing seeds, transplants, and potting plants on to bigger pots. Select from 7cm up to 10 Litre for your gardening project, and don’t forget the full sized seed trays for sowing, and tray hoods to help the growing process. Recommended use: Container pots used for shrubs, herbaceous and climbers’ examples: poinsettia & large cyclamen. These can be used for potting on as the plant matures and needs a bigger pot. He seems to think that he'll need a pot size that's over 20 litres, to get the required 9oz's from each of the 4 pots to make up the GPW. Dimensions: 55.5cm diameter top, 39cm diameter base and 48.2cm depth. Internal top diameter 50.5cm. Capacity: 75 litres. Dimensions: 60.5cm diameter top, 43.5cm diameter base and 52cm depth. Internal top diameter 55.5cm. Capacity: 100 litres.