Kratom got sickly yellowed leaves ?
Khlorotic Kratom Kured... easy peasy...
Gotta get the minerals they need inside of them. They can suffer from iron poor 'blood" too...
This means both having the minerals in the soil and having the right pH for them to be easily absorbed.
PRO TIP... try a bag~o~black-kow, if all else fails and you don't know what to do.
. Plant starter too... for the baby clones... pH of the drained waterings were adjusted to a slightly acidic 5.5~6.0 pH, from a more alkaline 7.5~8.5 pH. Some others have had to have acidic fish fert (for potted kratom) or Black Kow (for big in ground trees) added to decrease the pH. Must be that alkaline limestoney soil here..... Now the newer leaves reflect the ability of the plant to absorb nutrients such as iron, manganese, magnesium, etc.. thats better!. Potted kratom especially has pH problems here. Epsom salt and iron sulfate help acidify this alkaline potch and release nutrients to be absorbed. idk yet if older chlorotic leaves will green-up ever. The new ones are happy now..
Treated with slightly acidic Black Kow...
New leaves are GREEN