Novacastrian, it would depend on the normal root mass of the plant
in relationship to the physical size of the plant. C. Chinense have
a tendency to have a very large rootball, and will usually fill a
5 gallon bucket up, Annumms on the other hand have a much smaller
root mass for the size of the plant, and have a lot of room in a
5 gallon container, I've seen 3 or 4 in a bucket doing just fine.
Now Chinenses will get around 4-5 feet tall here in a 5 gallon
bucket, close to 7 feet tall in the ground with a 24 in spacing
in the row and 4- 6 feet between rows (they get quite wide also)
Annumms do well with a 1 ft spacing. The other types of plants
you are talking about get very large outdoors here, they also have
a quicker uptake of nutrients than peppers so the things that work
with them may not work with peppers.
ButchT