GS Plant Foods Cal-Mag Extreme Liquid 1 Quart Fertilizer with Calcium, Magnesium, Iron and Sulfur Supplement, Corrects Secondary Nutrient & Trace Element Deficiencies, N-P-K of 2-0-0

Use in small doses for plants watering and foliar. Goes a long way.

Great price, used this stuff before I swear by it.

Great product, super fast shipping! I've only used it 1 time but hoping it will replace the more expensive botonicare liquid cal/mag!!

Excellent soil enhancement. My plants are the kinds that need extra magnesium and calcium. This product is great for that purpose.

Great for the much needed calcium your plants need

This is a great product and worth every penny and customer support is fantastic my plants love it

The plants loved it and it gave them good calcium and Magnesium that your plants need. The bag seals pretty good, I'm on bag 3 and it does what it's supposed to! Functions good! Made my plants green! Cannafam

My biggest issue with container plants has been bottom end rot (tomatoes and peppers). Since I've started using this supplement, I have far fewer issues. The only downside is that I cannot find any recommendations as to how much of this product should be used. I've been "eye-balling" the dosage over the season, but a few ounces each week per 5 - 10 gallons of water each week seems to work well. From my understanding, it's hard to overdose on this supplement. I just hate the thought of using more than needed, and wasting $$$.