Hi all,
I'd appreciate any help possible. I'm in late stages of vegging. I was planning on flipping to flower in about 2 weeks my plants have been declining in health. I'm growing in soil. I have 2 in 10 gal pots and one in a 15 gal all smart pots. It is my own mix. The mix consists of 4 qt potting soil (promix), 1 quart worm castings, 1 qt composted manure, 1 tsp blood meal, 1 tsp bone meal 1 qt perlite. When initially planted into final pots the soil ph was 6.3. Every watering I Ph water to 6.2-6.4 and water when top of soil begins to be dry. I feed once every 7-10 days. I use Roots Organic Line. I'm using Buddha Grow and trinity. Cal Everything was pretty good. About 2 weeks ago I noticed some lighter lime green coloration in new top growth. I originally thought it was nitrogen deficiency or calmag. I tried upping ratios of both. As I started. I went and bought a soil ph test kit. The one with the capsuls. From that my soil seems to be about 7.0 I also bought one of the cheapie soil ph meters which says 7.0 as well. I'm not new to indoor growing but new to indoor cannabis. I tried lowering with phosphoric acid (ph down). First I made ph'ed water at about 4.6 I put 5 gallons of water through the 10 gallon pot, and 7.5 gallons through the 15 gallon. It waited a half hour and tested the soil the soil was at 7.0. So I made another solution of 3.5 ph'ed water tested after 10 minutes. Was at 6.5. Checked 30 minutes later and was at 7.0 again. So next, I added 3 tbsp granulated sulfur in the 15 gal and 2 tbsp in the 10. I know sulfur breaks down slowly. I decided to do an experiment. I made a solution of sulfuric acid and ph'ed to 2.5. Same results the soil ph rebounds to 7.0. After doing some reading I have come up with only one possible cause. I was giving cal mag pretty heavily. From my reading the magnesium can break down and leave behind a lot of salts that act as a buffer. Would everyone agree? If not what would make the soil keep on going up? What would be my best recourse? Flush soil with 3 gal ph"ed water per gallon of soil? Repot the plants with fresh soil? I have been vegging for a while don't want to loose them. I think the soil ph is causing nutrient lock. First two pictures is from 2 weeks ago second two is today. Thanks for any help or advice in advance.
I'd appreciate any help possible. I'm in late stages of vegging. I was planning on flipping to flower in about 2 weeks my plants have been declining in health. I'm growing in soil. I have 2 in 10 gal pots and one in a 15 gal all smart pots. It is my own mix. The mix consists of 4 qt potting soil (promix), 1 quart worm castings, 1 qt composted manure, 1 tsp blood meal, 1 tsp bone meal 1 qt perlite. When initially planted into final pots the soil ph was 6.3. Every watering I Ph water to 6.2-6.4 and water when top of soil begins to be dry. I feed once every 7-10 days. I use Roots Organic Line. I'm using Buddha Grow and trinity. Cal Everything was pretty good. About 2 weeks ago I noticed some lighter lime green coloration in new top growth. I originally thought it was nitrogen deficiency or calmag. I tried upping ratios of both. As I started. I went and bought a soil ph test kit. The one with the capsuls. From that my soil seems to be about 7.0 I also bought one of the cheapie soil ph meters which says 7.0 as well. I'm not new to indoor growing but new to indoor cannabis. I tried lowering with phosphoric acid (ph down). First I made ph'ed water at about 4.6 I put 5 gallons of water through the 10 gallon pot, and 7.5 gallons through the 15 gallon. It waited a half hour and tested the soil the soil was at 7.0. So I made another solution of 3.5 ph'ed water tested after 10 minutes. Was at 6.5. Checked 30 minutes later and was at 7.0 again. So next, I added 3 tbsp granulated sulfur in the 15 gal and 2 tbsp in the 10. I know sulfur breaks down slowly. I decided to do an experiment. I made a solution of sulfuric acid and ph'ed to 2.5. Same results the soil ph rebounds to 7.0. After doing some reading I have come up with only one possible cause. I was giving cal mag pretty heavily. From my reading the magnesium can break down and leave behind a lot of salts that act as a buffer. Would everyone agree? If not what would make the soil keep on going up? What would be my best recourse? Flush soil with 3 gal ph"ed water per gallon of soil? Repot the plants with fresh soil? I have been vegging for a while don't want to loose them. I think the soil ph is causing nutrient lock. First two pictures is from 2 weeks ago second two is today. Thanks for any help or advice in advance.
