I've used GH Flora Series (3 part) and liked it very much. It has ph buffers which help stabilize your soil ph (if using soil). I supplemented with
- Botanicare Silica Blast (during veg, makes plants tougher and more resistant to heat, cold, drought, pest). I start at about 1-1.5 weeks old and 1ml/gal, working my way up to 5ml, and stop using after stretch. Add this to your water first, or reserve 1-2 cups of water, mix it there and add it. It's very alkaline. (Your GH Flora instructions tell you to mix the black "Micro" part first.).
- Botanicare CalMag+. I used this intermittently in veg, starting in mid veg. I never use it at the same time as Silica because I've read the two can interfere with each other. For example, in late veg I might alternate each feeding with Silica then CalMag+. In flower, I use it in every feeding.
- Botanicare Liquid Karma. I used this starting around 1 week (1ml/gal) and use it with each feeding (5ml/gal after 2-2.5 weeks). I've taken to using Alaska Kelp (Home Depot or Lowes), like 3ml LK and 3ml AK. I like this even better than LK alone. And, AK is cheap.
- GH KoolBloom (liquid). I used this starting when bud sites begin developing, 2ml/gal, working up to 5ml gal. I use it with each feeding until 2 weeks before flush.
- GH KoolBloom (powder). I used this during the last 2 weeks at 1.25grams/gal.
- Molasses. I used this mid- to late-flower, 1tsp to 1tbsp/gal. I used Grandma's brand at Walmart.
I followed the
so-called "useless" schedule. (<<link). Generally, people follow GH's 3-2-1 schedule at half strength. "Useless" found just a little stronger ratios that work.
I've switched to
Grow More Sea Grow, (<<link) an inexpensive dry nutrient. It's a lot simpler compared to mixing 3 parts. But, it doesn't have the ph buffers like GH Flora. I have to adjust ph more now (like, feed at 7.2 to help pull the acidic soil up).