For the sake of having fun with both sides of the issue, I'll play plastic pot advocate:-). Keep in mind I can only speak from my personal experience of growing tropicals in containers here in Oklahoma over the last 30 or so years. What works for you somewhere else in the world may trump anything I might say. All plastic pots is a stretch :-). I use the Rootmaker inc. plastic pot which probably is the best plastic pot in the world. The one gallon pot has 28 holes (actually 56 with 2 side by side) in it and it dries out faster than your clay pots. I've done side by side tests with a decent number of plants to see. The black plastic Rootmaker 1 with the predrilled holes all around the container dry out faster than a red clay pot of similar size in full sun. I grow almost exclusively in plastic. Big plants weigh too much on their own even without the clay pot. I will put some specimen Adenium down the road in very nice very shallow ceramic pots. If I want an adenium to develop a more shallow and wider root span, I'll take a 10 inch hanging basket (I have a bunch of used ones laying around) and drill 1/4 inch holes in it for faster drainage. The 20-30 holes will be on the bottom and on the sides maybe an 1/8 inch above where the bottom of the pot is. With bulb pans I dont bother. I can make a plastic pot drain much better and faster "easier" than I can modify a clay pot. A modified plastic pot can give you a good run for your money. I've got literally hundreds of clay pots I bought at a garage sale about 15 years ago that I don't use. As far as adeniums overpotted, no matter the pot make up, they will rot if grown in marginal soil. Crappy soil is crappy soil. A pot will not make the difference. Personally I think soil is the most important part of what we do with plants outside of care. Containers or container sizes are probably next. 3 years ago I skimped on soil with a bunch of adeniums because money was tight and I paid a huge price. Over half rotted and many were slow to recover. A few with nice blooms I rerooted after I lost most of the root system. I just don't loose adeniums with good soil. Never have and hopefully never will :-). I can put a nice adenium in crappy soil and kill it over the winter unless I'm totally focused on that plant and watch it very close. I can put a another nice adenium in a great soil mix and rarely have to focus as intensely on it as I do the one in crappy soil. Bad soils can hide rot problems sometimes until it's too late. Good soils with good care hide nothing. There's nothing to hide. randy

Look below--we've been discussing Adenium alot lately.

I do not intentionally withhold water, I too prefer to keep them moist and fed during the summer growing season, mainly to fatten up the stems. Flowers are a bonus! But it does seem like when I go away for a week or 2 on vacation, or am so busy that I don't have time to water during a particular week, that there is a flush of blooms as soon as I resume watering as usual. It could just be coincidence. I have dozens of obesum seedlings growing now from named hybrids, in the spring I intend on planting them out in the garden and see if I can get increased growth with free root run. There will probably be mainly inferior [flowers] seedlings so I don't mind some experimenting and then having to dig them out and repot in the fall. If I can get 3 or 4 keepers I will be happy. Have you ever tried putting your Adenium out in the "field" for the summer? I have a true soco that I stupidly left too close to a heater that is in my propagation area for the other Adenium, and all the leaves and half the growth tip dried out. The bottom half and the caudex are fine, I anticipate some branching in the summer as a result of this inadvertent pruning. 2 yrs ago I forgot about a Pacypodium lamereii that was left out and got hit with frost in the mid-20's. All the growth points died back, but then in the spring so many branches resulted that right now I may need to cut some back because they are interfering with each other! x

I recommend waiting until around May or so, when you can put it out into full sun. They seem to branch better, and have more compact growth that way. When I say full sun, last year I placed one I had pruned right out into ALL day sun in the south facing back yard. It did great. I left my oldest, also recently trimmed up on the porch. The oldest now has 1 foot of growth, while the one in full sun grew nice branches of about 4-6".