adenium are native to rocky deserts ...they can handle the heat and no water for long stretches
they can go a few days, to much longer without water ....when hot and dry adenium may look wilted .... but they bounce back
much better to go days without water ....than frequent water ....water causes rot
I can vouch for coir ...been using it ever since i learned (from experience & dead plants) that peat / potting soil held way too much water
but I can not vouch for coir chips
~ A tried & true adenium mix ~
Mix together:
1 Part: Coconut Coir -
1 Part: Poultry Grit (chicken grit) /or Pea Gravel - (sift out any fine grain silt)
1 Part: Sand - coarse Builder's Sand, or Leveling Sand, or Horticultural Sand - (sift out any fine grain silt)
1 Part: Lump Charcoal - Break-up (crush larger pieces) - (sift out any fine grain silt)
1 Part: Lava-rock – (volcanic cinders or pumice) (crush larger pieces) - (sift out any fine grain silt)
1 Part: Perlite - coarse - (sift out any fine grain silt)
Optional: mix with above
1 Part: Redwood Bark / Orchid (Phalaenopsis) Mix - Break-up, cut or crush larger stems & bark
this is a fast draining, chunky, gritty mix .....or low organic, high inorganic mixture ....
this mix is at the low end of supplying available nutrients ....to supplement nutrients - add slow release fertilizer at every repot - and water every other time with water soluble fertilizer containing most of the micronutrients
my go to fertilizers:
Osmocote 14-14-14 (at repot) ....
Miracle-Gro All Purpose 24-8-16 (every other watering) ...........
