Not really, but many will give two - three or more pickings. All of them quit when temps get to the nineties. Tall versions like Sugar Snap yield a little longer than the short varieties.

What dill said. Check with you local county extension for planting dates. Seed packages are not accurate at all for planting dates. I would think where you are, late October/Nov planting would be about right. They won't do much in the winter but as soon as there's more light and a tad more warmth, they'll produce over and over.

Kevin

Not sure about in Texas, but snap peas and snow peas seem to produce for quite a while here in the Northeast, unlike shell peas that are done quickly.