Yellowing week 3 of flower. Please help!

Lowlifellamas1

New Member
Hey, My sativa (bag seed) is in week 3 of flower, and a couple of days ago I just noticed a few leaves were discolouring and forming brown spots. Over the last few days the entire plant has changed to a yellow colour and is looking unhealthy. Other than this the plant has been very healthy and everything has been going smoothly . I am growing in soil, with a ph of 6.5. have been feeding 15ml 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 in a ten litre pot. Daytime temps around 22C nighttime around 15C, RH 30-40%. I was thinking I could’ve been over watering so I’ve laid off the watering for about 4 days now. Any more info I can provide just let me know. Thanks!
 

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Why are you only feeding Canna P/K? You need to feed a balanced fertilizer from start to finish. Plants need nitrogen and other nutrients throughout their life cycle.
 
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