How many poems should one have published in literary journals before one attempts to publish a collection?

Question

Trying to establish a baseline here, as the local library is a little impoverished. Conventionally poets publish a number of pieces in journals and magazines, then begin soliciting publishers to print a collection of their verse (the ones that appeared in journals plus a bunch of new ones). Is anyone aware of just about how many need to be in print beforehand?

Answer 1

your minimum for presentation is ten. you will want at least 15.
they don't even have to be long poems

Answer 2

it depends how much success they have had. but i would say at least 10-15. people want some substance if they are going to be buying it.