31 days into flowering problems

Hi everyone, i am growing for the first time.
Strain: Strawberry
Medium: Canna Bio Terra with 25% perlite
Nutrients : Canna Bio Flores, Canna Bio Boost
Grow tent : 5x5
Light : 1000 watt HPS
Daytime Temperature: 24 - 28 *c
Nightime Temperature : 19.5 - 21*c
RH : 40 - 50 %

Throughout all my grow i never was able to feed over 25% of the recommended dosage for Bio Canna line without beginning to observe clawing and leafs tip burn.

I have fed once every two water at 15 to 25% strenght.

The plants are in a 10 gallons fabric pots since the 5th ish week of vege.

Everything was fine untill 3 days ago even though i could observe that the plants were not as green as they should but each time i would try and raise the nutrients i would have burnt tips so i always backed up and keep solution under 15 to 25%.

I always ph watered my solutions and water between 6 and 7 but never really monitored EC and PPM because in a 10 gallons i would had overwatered each time.

Since flowering the can take now 2 gallons of water with 10% run off every 4 days so i am able to do so.

Before the big problem showed i watered only water 3 days before with well water and did not ph it. I know this water to be around PH8 and 200 ppm which i know is not good.

So finally 3 days ago when i open the tent i've noticed major yellowing leaves on my biggest and tallest plant with brown spots. I gave them all water because it was the time with the usual solution. Being over anxious i made endless research and from what i have read i think it is a Nitrogen deficiency and a magnesium deficiency. I knew i had to test the PH to see if there was a lockout which i did.

Water used : 8 liters Distilled ozonated water with a PH of 5.8 - 6.0
EC : 0
PPM : 0

My run off was :
EC : 1480
PPM : 733
PH : 6.2

I have put 4 liters more of the same water with 8ml of BioRhizotonic (EC 95, PPM 53 PH 10.33) and the run off was :
EC : 1528
PPM : 768
PH : 6.0

I have also foliar spray all 4 plants 2 times with 1tbs of Epsom salt in 1 gallon of distilled water as the 3 others are also starting to show same deficiency but at a slower rate.

Any thought or advice will be very much appreciated

Thanks

Sorry the pictures did not upload

That looks like normal yellowing that happens in flower to me, but I have never grown in the media you are using. I wouldn't be too worried if the rest of the plant looks good.

There it is

TessaMaria said:

That looks like normal yellowing that happens in flower to me, but I have never grown in the media you are using. I wouldn't be too worried if the rest of the plant looks good.

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Yeah i thought of that too but let me know with the other pictures too please ! I find this early a bit for yellowing that much

Yes maybe it does look more than the normal. The other pictures have dark spots and some brown spots. Maybe from the foliar feed? I am guessing now, but the pattern on the darkening looks like a foliar spray. I think you are on the right track with your research. Someone with expertise in the media will chime in soon hopefully.

TessaMaria said:

Yes maybe it does look more than the normal. The other pictures have dark spots and some brown spots. Maybe from the foliar feed? I am guessing now, but the pattern on the darkening looks like a foliar spray. I think you are on the right track with your research. Someone with expertise in the media will chime in soon hopefully.

Click to expand...

They were like that before the foliar feed. Thanks Tessa very appreciated