I am growing sweet peas for the first time this year and the stalkwas a good length when they first flowered, Now some weeks later the stalk has reduced in length to about half what it was. I wonder what I should do to get it back to its former length and what I have done wrong to allow this to shrink so much so as to avoid making the mistake again in future
John sorry if you were hoping for a sensible reply to your question. Truth is I don't know the answer, but I've got the same problem. I've got some growing in a large container - they're the one's that have gone short, and some against a fence which have stalks a foot long with plenty of flowers up the stalk. I know I had a couple of different varieties, but don't know which were which :-[ Hope a swwet pea grower stumbles by with an answer :)
It could be heat related.
My sweet pea stalks always shorten as time goes on. I always assumed it was just one of those things that happened, probably because of the plant losing vigour as it aged. Could try feeding I suppose, but I only grow them for the house so short stems aren't a problem - they still smell the same.
Sue