Do I need ph check when flushing with R/O water ?

baxbax

baxbax

Active Member
Hi rollitup , I got a bit tip yellowing after feed today (still no tip burn ) and i'm sure I overused nutrients this time , going flush a 25 gallon pot with 90 litre ro water ,

1) is 90 litre enough ?

2) I dont want give plant more nutrient from ph down which is phosphoric acid , my water is ro , when I add ph down ph drop sharply , and don't feel good add more P when have tip burn . what do you think ?
 
baxbax

baxbax

Active Member
hotrodharley said:
Just plain RO water. Check the runoff from that. Then make a plan from there. Bet you'll be surprised that it's not as out of whack as you fear. Nitrogen is quickly utilized and also quickly depleted.
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could intense sunlight and hot temp cause have this nutrient burn ? the talking plant is about 3 month old , I'm giving the same feed same condition to a 20 days old seedling without having this tip yellowing , they are same gen same batch , difference is I re potted 20 days old seedling about 13 days after re potting my 3 month old . maybe more salt build up IDK
 
baxbax

baxbax

Active Member
I even gave same feed to 10 days old seedling without burn , but in fresh promix ,

how much should I water feed for 25 gall pot every watering ?
 
baxbax

baxbax

Active Member
I think nitrogen is exploding in soil , even after I did flush but nitrogen is peaking up , leaves bacame today so dark green , UREA !
 
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