Phal Orchid leaves with patchy green and yellow areas

[sweta]

Originally Posted by Ray

For that formula, you should be applying your current solution every week, not every two.

Do not bother adjusting the pH, as the solution pH does not affect the rhizosphere pH very much, if at all.

Is the medium getting dry between waterings? If so, water more frequently.

Oh yes you are right didnt realize I have to increase the fertilize during the summer months hmm so this is probably due to nutrient deficiency.

The medium doesnt get dry between waterings. In fact I have to wait longer to water than the usual watering schedule for my other orchids.

Regarding the pH, I've been reading up online that for nutrients to be absorbed properly phals need slighly acidic medium like 6.5 pH. Wont it make any difference if the water content is alkaline? I dont get a great bloom show thats why wanted to see if this would change anything

---------- Post added at 03:09 PM ---------- Previous post was at 02:56 PM ----------

@es and @ray should I treat my orchids with cal-mag just for few weeks to overcome the deficiency?