I noticed that most of the larger pots I have outside already are betweeb 10 and 18". Are these large enough to hold my pepper plants or should I get larger. I usually use them for tomato plants and have had very little problem with them. I did have a poblano plant in an 8" pot last year and it didn't give me too many peppers - about 4 and they never grew very big. Was this why? Size of the pot was too small? If so, I'll go to Home Depot and buy larger pots. What diameter should be they be for them to have lots of room for roots to grow? RisaG