The highest concentration of water soluble vitamin B1 available to the home gardener is RAW B-Vitamin, which has 1% of vitamin B1. RAW B-Vitamin contains 9% magnesium as well and is an optimal magnesium supplement. RAW B-Vitamin is most beneficial during transplant, times of stress, during heavy fruit and flower production. Use RAW B-Vitamin at all times of grow and bloom stages and is a beneficial supplement to all feeding schedules. A 2 oz package of RAW B-Vitamin makes up to 200 gallons, an 8 oz package makes up to 800 gallons and a 2 lb package makes up to 3200 gallons.
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