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Leaves getting purple, nothing I tried helped

Generic Name123

New Member
Hello everyone!
As you can see in my pictures, the leaves of my (4 week old Sour Diesel) have gotten purple. She gets 12/12 for a week now but the leaves have been purple before that.
Some other facts :
temp is ~25 degree Celsius (77F) during lightening and ~23-24 degree Celsius (73,5F-75,2F) during "night".
Humidity is >50% at any given time. Mostly even >65%
Im growing in soil and shes gotten new one 2 weeks ago.
I use BioBizz nutrits even though Ive stopped giving some since the edges of the leaves seem burnt....
The PH of the soil is beteween 6,3 and 6,7.

Ive read online, that this might be caused by a Phosphurs defficy, but I am kinda scared to give more nurtrits since the leaves are already burnt...

I really hope you guys can help me!


Generic Name123

New Member
Thanks for the fast reply !
I thought about Nitrogen defficy too, but if I give her more Nitrogent, wont I even burn her harder?

It's a "hobby growing soil" which I have been using for my "normal" plants for a long time.

It says:
PH: 5,5-7.0
Salt: g/L : <3
Nutrits: 100-500mg/l Nitrogen, 30-100mg/l Phosphate, 400-1200mgl/l Potassium


Member of the Month: Mar 2019 - Grow Journal of the Month: Jan 2020, Aug 2021
You have not burned this plant. You are starving this poor yellow thing. Full strength nutes, at the proper pH, ASAP... that is what she needs. You have just moved her into flower where her nutrition needs have changed drastically... now nitrogen is not her primary need, it is potassium and phosphorus... and she needs it now. You will be amazed at how green she will get after you feed her some bloom nutes, but be aware that now that you are playing catch-up, and it is going to take several watering cycles of properly using the instructions on your nutes to fix this.
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