All of them. I don't have a single sample left for display purposes. (waaaaah!) It was entirely my fault I must confess. The poor little things got infested ( I think it's aphids or spider mite) and I ignored them. I'm only human after all. Oh well ! Coleus are abundant in the garden centres in late spring. Or maybe you can get a cutting off a good friend? Back to business.......
Where were we? We had our cuttings transplanted into soil and were waiting for our plants to grow a bit taller.
The first thing to consider is proportion in relation to your container. For example if my dish/basket garden is 9"(approx. 23cm) in diameter, the finished tree shouldn't be any taller than 9" (approx. 23cm) from the ground up. If you look at a real full sized tree you will notice that the trunk takes up about half and sometimes less than the bushy part for a realistic looking scaled down miniature. For example if your stem is 8" (20cm) you will be aiming to train a 4" (10 cm) bushy head. It should look pleasing to the eye and of course we are aiming for the "cute" factor. Take a look at the picture of the one in the upper left hand corner here. Use your best judgement and don't worry because the beauty of plants is they are quite forgiving. For those of you thinking of instead growing a much larger topiary to display on your porch, the rule of thumb is 2/3 trunk to 1/3 head. Those are quite spectacular too!
Thirdly it is important to know where to cut back for a tidy appearance with no stubs shriveling up and ruining the look of your soon to be little tree. The trick is to cut as close as possible to the node without the risk of injuring it and not so far away that there will be a visible stub. I'm reminded of a horticulture teacher who once said about pruning larger specimens: " If I can hang my hat on it, it's too long!"
Good luck with your mini trees and I invite your feedback!