Winter Experiment Results
Here are my results (so far) of growing seedlings over our UK winter period using both light and heat. The light units are T5 HO fluorescents and heat from a propagator base. The lights were in use for 15 hours each day since 25th October last year when the seedlings were emerging. The propagator base provided a minimum of 80 degrees 24/7. The two plants I am illustrating are representative of this first batch. Several other batches were sown later. I want to see if it is possible to get from seed to flower in one year so extending the growing period is a must. It also provided interest in an otherwise dull period for adeniums. Both of these plants stand 14 inches tall from the base of the 3 inch pots. As you can see the result was a "swings and roundabouts" affair. There was plenty of growth but at the expense of other characteristics, namely the caudex development.
Here is the first example. Here there is otherwise healthy growth but an insignificant effort for a caudex. I would expect a plant of this size grown normally to look much more mature and not like a giant seedling.