I am growing my plants in a greenhouse. Temperatures range from 60 at night to 80 during the day. Humidity ranges from 50-70. Plants are in 10 gallon containers. There are 4 Afghan and two white widows. All are floweing and relatively healthy. I am applying neem oil to control some aphid problems. The treatment is working well. One of the white widows has develpoed some yellowing at the margin and tips of the large shade leaves. It looks similar to either a potassium or magnesium deficiency. I have started using Jack's Classic Bloom fertizer (10-30-20) at the rate of 1/4 tsp per gallon of water with each watering, approximately every 4 days. The Ph is between 6.8 and 7. If you have time, take a look at the photos, and tell me what you think. Thanks!
RetiredFF Reviewed by RetiredFF on . Seeking Advice I am growing my plants in a greenhouse. Temperatures range from 60 at night to 80 during the day. Humidity ranges from 50-70. Plants are in 10 gallon containers. There are 4 Afghan and two white widows. All are floweing and relatively healthy. I am applying neem oil to control some aphid problems. The treatment is working well. One of the white widows has develpoed some yellowing at the margin and tips of the large shade leaves. It looks similar to either a potassium or magnesium deficiency. I Rating: 5