Well, Taylors Greenhouses, of course on Fairgrounds Rd off 234. I found a lot there last year, but they are only open for a short period of time--like 3 months! You can look on the web for their page.

Ashcombe in Dillsburg and Country MArket nursery up the road from Ascombs here often.BOth are off rt#15.do you live in adams?I DO.

Highland Gardens in Camp Hill and Rose Hill close by also have annuals. HG has been beefing up their annual collection over the past several years to include some that are perennial in warmer climates. They also have a nice selection of shade perennials, as well as perennials for sun.

There are also a couple of greenhouses going South on Rt. 74 from Dover, one just before downtown Dover and one shortly after you pass through Dover, both on the left.

There's also a nice greenhouse in Hellam, on Market St. headed toward the Susquehanna River. Just before the bridge going over the Susquehanna, there should still be a small Armatelle factory outlet on the left, right on the river in Wrightsville.

A smaller, but still interesting greenhouse is North of York on North George Street Extended, best accessed via a shortcut from Rt 24 if coming back from Hellam.

You could make a day of it and do the whole circuit!