Help in diagnosing

Purple Kush Auto
Tent grow
10 weeks
4 weeks into flower
FFOF w 30% perlite
Water with 5.8-6 ph
Ocean Forest 3 pack nutes
Just using tiger right now at 1/4 strength
Saw tip burn and tiny yellow spots on older top leaves first, spreadinv throughout now.
Looked like nitrogen burn so I flushed well and got ppm down to 900 And ph looked good
I am wondering if they need cal/mag and more phosphorus though and am second guessing my diagnosis.
Any help would be appreciated.

For starters don’t PH your water so low for soil. You’re giving hydro PH for a soil grow. In soil don’t PH the water at all just take it from the tap and water the plants with it unless it’s heavy with clorine from municipal water supply. Also you need to give them a well balanced feed when the FFOF runs out of food and that’s what looks like is happening.
You’re saying ocean forest 3 pack nutrients never heard of that. There is fox farm nutrients and they make a bunch of different ones so what have you given them in total?

the tiger bloom is for budding but very low in Nitrogen so you can just cut out all N because it’s in flower they need a well balanced feed going forward. I would use all 3 at a lower than recommended dose say start at 1/4-1/2 what they say to use but you have to use all 3 and mix them in the correct order.
Start there. They don’t look to bad so you have time to correct it

Ugh, I meant fox farm trio of big bloom, grow big, tiger bloom
I have followed the ff feed schedule but cut it down to 1/4 strength, and cut out the middle two weeks since autos flower so quickly.
My water is fluoridated and chlorinated so i have a tap filter
Next feed i am doing big bloom and tiger bloom and just picked up some cal mag
I have never worked with autos before and havent grown in over 15 years, and back then was hydro and hps

I think i am going to try a different soil and nutrient line next go around
I got a free bag of fox farm fruit and flower which is a dry fert so I am not comfortable using it so late in my grow, but was wondering if anyone has used it for a tea or topper? Its got some good stuff in it.

Thank you for your suggestions. It would be much easier to water from the tap. So many folks suggest a lower ph 5.5-6.5 for watering even in soil, so i just went with it.

michigal said:

Ugh, I meant fox farm trio of big bloom, grow big, tiger bloom
I have followed the ff feed schedule but cut it down to 1/4 strength, and cut out the middle two weeks since autos flower so quickly.
My water is fluoridated and chlorinated so i have a tap filter
Next feed i am doing big bloom and tiger bloom and just picked up some cal mag
I have never worked with autos before and havent grown in over 15 years, and back then was hydro and hps

I think i am going to try a different soil and nutrient line next go around
I got a free bag of fox farm fruit and flower which is a dry fert so I am not comfortable using it so late in my grow, but was wondering if anyone has used it for a tea or topper? Its got some good stuff in it.

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The fruit and flower works well with their soil but it does take some time to break down into available food so if you too dress with it just plan on doing before it’s actually needed. Good luck they don’t look horrible so they should come around

michigal said:

Thank you for your suggestions. It would be much easier to water from the tap. So many folks suggest a lower ph 5.5-6.5 for watering even in soil, so i just went with it.

Click to expand...

I’m sure it won’t hurt but I have always watered my soils with tap at 7 ph because the soil buffers on its own so there isn’t really a need to PH the water unless it’s off the charts high or low

You really should consider PH'ing your nute solution to about 6.2 (after calmag and nutes are mixed), particularly with synthetic nutes. Each nutrient/microntrient has a specific ph range in which it is available to the plant, if you PH to about 6.2 (for soil) when you add your nute solution the roots will immediately pull those nutrients available at that PH level, as the water/nutes works through the soil, the soil will buffer and raise the ph, at which point those nutes/micro nutes available at higher PH levels will be available to the plant. If you start with a PH of 7, you're not going to get good absorption of some nutes. Just my .02