Marica, Most of the Adeniums have a built in Dormancy gene and it is good for them to have this. Many times we may not think that they are dormant, but can be semi dormant and just not active.

Depending on what type of lights you have will gauge just how far you can have them away from the foliage or branch tips if leafless.

With my T5 HO Flourescents I have them 2" from the foliage. My aquarium lights on other plants are about the same. I like to have the lights on for atleast 14hrs. when they are situated in a place that they receive No sunlight. Others that are receiving south facing sunlight, I have lights on them for 8hrs. As long as the temperatures are staying at the 72 degrees, as mentioned above. You do not need the temps. any higher. It will be the hours of sunlight that will trigger them out of dormancy. This will be a slow process and even once they start producing new leaves, watch you watering. Only when they start producing good branch growth should you start increasing the watering.

You can start them out with as much light from you artificial lighting as you want and it will not damage them.

With the space that you have under you lighting, I would place the ones that do have leaves getting the optimum amount of the lights and the leafless ones to the outer areas of the lights. They are dormant and will take there sweet time coming out of this, so give it to the ones that have leaves.

Rick

Thanks Rick. I pruned them the end of August and they only just leafed out just before they were brought in. Sun was getting short after our heat wave. Hope they sprout more this Spring. My husband is going to hate the bright light in our room in the evening. Oh well!

Hi the output of my LED's are close to T5. The fixture goes the length of the plants but not as wide. Will the light radiate out to the plant edge, of not quite 2' ? Or should there be two rows of light?. I just want to keep them out of full dormancy, like they have always been in winter here.

Marica, I know with the T5's the plants will grow outside the edges of light source, but best underneath. I remember Tracy & a few others discussing the use of their LED lights and it seemed similar in placement under the lights. They also spoke of their lights not necessarily being as close to the plants as which I do w the T5's (approx. 2" from foliage).

Rick

Blast, I knew it. Guess I'll get another

I have a full spectrum 50W on my first seedling to ever live. It is really dark green, multi branch 45 day seedling. I've been running it 12hrs. 5" above plant.

Marica, I think if you go the top of the page within the Adenium Forum and type in "Mars Hydro" in Adenium and click on it, it should show a bunch of threads that Martin and Tracy (addicted to plants) had talked about. They spoke in depth about it and they also use LED lights. I know that there where a few other people as well.

Rick

rule of thumb is 100w per plant and as close as you can to the plant. If you can hold the back of your hand under the light and it does not burn you are good. With led's as close as possible, with t5's about 6 or 8 inches, with hps about 2 feet. I over winter 2 of my plants in a grow tent under a 500w hps. Works great. I go 18 hrs of light and 6 hrs dark per day.

Wow that seem like a lot but I know I have to get this going. They have always had winter sun. It's odd to see them so bare. Thanks abrahamix. Have not had time to look up Ricks info.

no idea what ricks info is. That is just my info. They will grow way faster than summer with that system. I grew a couple that way cuz I wanted to push them to get big. My one is over 5 feet from the soil line. There is nothing wrong with them going dormant. Probably better for them really. I really would not even worry about it if I were you. Just keep them in a sunny window till you can take them out. If its not going under 50 than you should be alright to leave them outside. I even had them out around 45 degrees for a day or two here and there and they are fine.

Well maybe 100w per sq ft. After seeing your pic alot of those are small so you dont need 100w for one of those small plants. I was thinking two feet tall by two feet wide. Just leave them. Your in cali, they will be fine. Mine sit in a east facing window here in MI and they do more than fine.

I only have one 12yr old the rest are 1.5 - 4yrs. They get no sun. All but one is shaped. I will just give them a early spring head start. We have a short growing season. I have only seen half of them bloom. Thanks for your advise!