Using Cal-Mag+ for BER

[AKmark]

Originally Posted by Yak54

When I began using grow bags I also had issues with BER for the first two years. After that I switched to a 4-18-38 fertilizer with Cal. Ni. & Mag. Sul. liquid feed applied 1 or 2 times per day. Also started checking moisture twice daily in the soil less mix of the grow bags and BER went away almost totally. Now I'm a happy camper even though this is labor intensive but the productivity is worth it.

That is a great formula that is well tested. To be exact, we add equal parts of 4-18-38 and CaNO3, and about two thirds of those ratios is Epsom Salt/ MgSO4. For 100 gallons, 8oz, 8 oz ,5 oz- every time you water if the media is similar to Pro Mix. If watering is good, a grower should rarely if ever del with BER . pH should be around a 6.2 with an EC of 2.0- 2.2.