Unknown strain week 2 of flower. Discolouring on a couple leaves.

[Lowlifellamas]

Hey,
My sativa (bag seed) is in week 2 of flower, and I just noticed a few leaves were discolouring and forming brown spots. Other than this the plant has been very healthy. I am growing in soil, with a ph of 6.5. have been feeding 10ml canna Pk in 10L of water for every second watering. Water is ph’d to 6.5 every time. I tested runoff today and it was at 6.5. Growing under a Mars ts600 at 16 inches. Any more info I can provide just let me know.
Thanks!

 

[Scrogger2190]

How big is the container and how often do you water it? Also what are your day and night environmental conditions? Temp/humidity

 

[Lowlifellamas]

How big is the container and how often do you water it? Also what are your day and night environmental conditions? Temp/humidity

I water it maybe every 3 days usually when the soil has dried out. Daytime temps 20C night time maybe 12C. Humidity always around 30%

 

[Lowlifellamas]

I water it maybe every 3 days usually when the soil has dried out. Daytime temps 20C night time maybe 12C. Humidity always around 30%

10 litre container too. Thanks for your help.

 

[Scrogger2190]

I would try raising you day temps to 23c and try not letting it go below 20c at night. Also bring the humidity up to 45% it could be getting cold at night. I'm not sure on the strengths of the bottle you're using but generally start at half the dosage the bottle says and work up. You could always do a flush and feed the next time