I started my 'Marvelous Marble' heuchera by seed for the second year in a row. I wintersowed them last year and didn't get a single plant. This year I started them in my greenhouse and they're doing fine, just slow going. They're out in dappled morning sunlight now. When they're seedlings are they usually slow starters, they're still so small? Should I put them in more sunlight? When should I put them in bigger pots or put them in a 'nursery bed'? I don't want to mess them up, I LOVE heucheras and want to learn how to handle them properly. Thank you for any help you can give in advance. If I need to put a picture of them on here let me know and I'll try to do that tomorrow.
In my experience, the little guys are very slow growers. I bring them inside for the winter. When I bring any Heuchera indoors during the winter, they don't do much, but as soon as I put them outside with their friends in March, they flourish.
Every Heuchera I have that started small took a long time (2 years at least) to become strong.
I keep most of mine in containers so it is easy to move them around. Your Georgia weather might be a little different.
You might have seen these but these are my seedlings. Planted last fall in the greenhouse. Still not very big. I collected seed from my Heuchera. Tons of variation.
I could collect seed again from mine and send for postage later. Only if you are very interested as it takes lots of time to get most of the chaff out of the seed.
I'm just now getting interested in heucheras since I've made a new bed in partial shade. Could you give me some suggestions about which ones grow the tallest? I'll appreciate any guidance you can give me.
Most of the heucheras on the market are about the same height. However they do have different sized leaves. There is a new one out called 'big top gold' that is taller. Looks very much like caramel. In the next year or two you will start seeing mini heuchera from Terra Nova Nursery.
I was just reading that these are heavy feeders at this stage of spring. I'm guessing they don't like that level of fertilizer. Slow release is not for them right now. Under the right conditions, they should be doubling in size over the next 2 months. This happened to a grower I know.