We had 500 kapok tree and distance in between tree 24 feet. I want to grow some other plants under the kapok tree, but I don’t know which tree is best for growing. If you know, let me know.
I'm afraid you'd need to provide a little more information before I could make any suggestions. For instance, how old/big are these trees? This could affect the amount of shade under the trees, which directly influences what you can plant there. Also, I'm not familiar with the climate, soil, water, market, availability, etc in your area of the world. Perhaps if you consult with the nearest university agriculture dept you will be able to find some meaningful information. Good luck.