What disease is my tree sick?

Glad I had a half dozen folks agree. 😂

magnesium for sure! hit it with calmag every feeding you'll be good.

Hello yes it is magnésium déficience so the easiest way is to use Epsom salt to solve your problem. Epsom salt are the best for that. Good luck

Looks like a magnesium deficiency. The yellowing between the veins is a sign of that. You can either add some cal mag to your next watering. Start with a small dose and see if it stops it from spreading. You can add a small amount to water and use as a foliage spray for a more fast acting fix.

Hello there, This is a Magnesium deficiency. You can add some EPSOM salt to your water to correct it. Have a nice day in Vietnam

Hi @felizchan , sometimes a magnesium deficiency will show like this

If you are only giving pH 6.5 water and nothing else, your plant will be hungry for most nutrients. The strange leaf(s) is not a disease but a symptom of nutrient deficiency and while a lack of magnesium is the most likely cause, your plant will need a balanced feeding every 10-14 days to continue its development. Look for a nutrient product with moderate levels of nitrogen, phosphorous and potassium and which also lists calcium and magnesium as ingredients. Nice training job by the way! Hope this helps, Organoman.

hey there, that's a magnesium issue , just add calcium magnesium it will recover. hope this helps ! 🚀

As roberts has mentioned, it is definitely one of two issues. Most likely pH however the temperature of your substrate or feeding water can cause the issue too. Both will give you a slight lockout. Magnesium and calcium deficiencies are usually the first to show up when you have these issues. Check your pH and ec levels. Make sure your water is around 65'F when feeding. Good luck and happy growing...

It is one of two things. Your substrate ph is out of range or close. Or it just needs magnesium. Adding a cal mag would likely resolve the issue. Good luck and happy growing 🌱