So many pentas are propagated by cuttings. Ask Longwood Gardens where they got the plants. Get a plant and take cuttings. Also before you buy seed, on a search engine type in "pentas trials" or similar. You can get good performance info that way, particularly if a trial is in your area. If you search you may land on one variety or color. Check the main list; often they trial several pentas if they do a penta trial. Some of the pentas that are readily available from seed turns out not to be great trial performers. The biggest issue is lack of uniformity between plants. On your search results you may have to click several pages before you see all trials. Example link below. UGA is always good as well as UoF and the Dallas trials and many others. Here is a link that might be useful: Cornell

I stumbled upon this looking for something else...he includes a minute of so of visiting the production greenhouses, which are not normally open to the public. Nice overview of the conservatories there though...and many subtropical perennials ;-) https://youtu.be/ogR3nChbmPE?t=107

Just beautiful. You reminded me of one year so many years ago, Dad told me he went to the public gardens and watched one of the gardeners pruning the mums and he saw where he threw the clippings. Dad went and salvaged a bunch, brought them home, rooted them and then tended them and tied them along the fence. The plants grew to be about 5' tall and bloomed with the giant pom pom mums. They were stunning. Like this one...6" across.

Well I'm getting normal listtings of threads.. And @dedtired-- I didn't quite understand the 3 D glasses. Just lit the menorah and put on a pair and oh my goodness! Thank you Rainbows coming out of the flames!!! . Can't wait to give it to my grands when we see them Tuesday and light the candles! So excited. thank you