start checking ur ph lvls, its a must...if the ph is to high or even to low u will cause nutrient lock out. ur showing nute deficiencies, but dont just go and add nutes. mix ur water and ur nutes and then adjust ur ph, even though ur in flowering stage ur plants are lacking nitrogen, add some extra nitrogen, but keep ur phosphorus a lil higher...i went and searched ur problem in my cannabis grow bible so this info is pretty much dead on
mattj12pint2 Reviewed by mattj12pint2 on . lower fans leaves turning yellow need help Hi this is my first grow and im 3 weeks in to flowering and lower fan leaves turning yellow and the higher fan leaves are getting blotches on them. Im growing white widow in a mix of soil,perlite and miracle grow seedling compost the ph is 6.8 temp 70-80f i use tap water for watering that i leave a few days in a bucket before using(i dnt know the ph of the water) the light is a 150 watt hps Rating: 5