Hi all, I’m having a problem with my first indoor grow (from seed). Plants are 4 weeks, and three of the four plants have yellowing leaves starting with small irregular yellow spots and becoming progressively worse over the last week until some leaves are falling off of plant #3. Here is some additional info:
- What strain: Purple Grandaddy
- Method: Soil
- Vessels: Pots, 5 gallon
- PH of Water: 6.45
- Using Hydroponic veg state fertilizer, full strength, daily
- Light system: 2x 200 watt Vivosun VS2000 LED lights
- Temps: Day 78f, Night 71f
- Humidity: 45-50%
- Ventilation system: Yes, Size 6”, 440 CFM Vivosun inline fan and carbon filter
- Co2: No
Here are my water parameters (ph of water with fertilizer, and effluent ph draining from each plant):
PH of Water (with fertilizer) = 6.45
Ph of Effluent water = 6.1
Ph of Effluent water = 6.35
Ph of Effluent water = 6.4
Ph of Effluent water = 4.86
Plants #1-3 have the yellow leaves shown in the pics, plant #4 has dark green leaves, is growing shorter and much fuller than the others, and appears very healthy.
A bit more info, one of the 4 pots (not positive which one but suspect #4) was entirely new Black Gold Organic potting soil. The other three pots have the same soil, but we’re reused after a grow outside last summer. It seems as though the plants with the highest differential Ph are the healthiest.
Not sure what to do?? Thanks for any help in advance!!