Thanks for ur advice. Under leaves are burned too, so I guess it is nute burn. And I read a article about PPM&Burn, it said plant will be burned when the water runs off, because water is absorbed faster than the nute of the solution, and the PPM will go up rapidly.
Thanks for ur advice. Under leaves are burned too, so I guess it is nute burn. And I read a article about PPM&Burn, it said plant will be burned when the water runs off, because water is absorbed faster than the nute of the solution, and the PPM will go up rapidly.