• You need to choose a grow bag that will allow the air to circulate around your plants, but not allow too much water to get in.
• The grow bag should be large enough to fit all of the roots of the plants and some soil.
• The best bags have holes in them so that the roots can breathe properly.
The best grow bag size for tomatoes and pepper is recommended to be as large as possible, since the size of the bag will affect the growth of the plants. A smaller bag will give less support to the plant and might lead to more nutrient deficiency in the tomato fruits.