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according to their feed chart, the liquid is used from early bloom to late bloom and the dry is used in the last week before the flush. The liquid is 0-10-10 and the dry is 2-45-28. I had just planned on using the liquid and not worry about the dry since they only recommend it for the 11th week. But the shit is expensive. On the upside, it only takes 1ml per gallon so it would last quite a while. But if I could find a similar formula for a lot less...Why Not?
Liquid koolbloom isn't that expensive $22 a quart. That will last me a 9 week flower mixing up 5 gallons at a time on a feed feed feed water schedule. Just start out light with liquid koolbloom I go 2 ml/gallon at the beginning of week 2 and slowly increase week by week and never use more than 5 ml/gallon I stop using liquid koolbloom at about 6 1/2 week in, so really I'm only using it for 4 1/2 - 5 weeks. That quart easily lasts. Then when I stop the liquid koolbloom at 6 1/2 weeks I use only the powder at the end for 3-4 days no other food. Then 14 day flush.
Be careful and pay close attention because that koolbloom will fry your plants if you get heavy handed with it.