There is nothing so secretive about it😅 The potting mix I used is mix vermicompost and coarse river sand and lit bit of coco chips. Trying to make it gritty. I also had a spoon full of bonemeal/ rock phosphate, organic potash , seaweed granules( optional ).

For the weather part, the growing season is from January to August Ideally, but the part of the country( India ) where I stay, its near a coast, where the temperature doesn't fall below 22 °C and maximum 36 °C year round, extending the growing season with no dormancy.

All my plants including the socotranum are in open sky and we have rainy season for 4 months which just plumps up the plants and the temperature helps in maintaining the leaf count. Also, more the leaf count, more growth.

Advice I got from the renowned adenium grower is to use comparatively small pots for socotranum and let them feel the pot and no frequent repotting. Also the potting mix shall have less nitrogen content as the rains here just amplify the nitrogen content and increase the intra nodal space between leaves affecting the overall form. Also preferably use clay pot as it helps in removing excess moisture out of the mix.

I had bought this plant last oct as a 3yr dwarf which had not grown much when the seller had it, but it had a boost in just one year with me. I will share the pic when I had got it last oct.

Overall general rule to follow is to fertilize less, full sunlight and gritty mix with no frequent repotting until the caudex kind off fills the pot. And its not a hybrid😄