GS Plant Foods
GS Cal Mag Extreme Calcium and Magnesium Feed
GS Cal Mag Extreme Calcium and Magnesium Feed
Cal-Mag Extreme supplies rapidly absorbable calcium and magnesium alongside sulfur, iron, manganese, zinc, boron, and molybdenum. These secondary compounds reinforce cell structures, sustain chlorophyll synthesis, and improve how roots assimilate primary fertilizers. Weekly root drenching corrects yellow foliage, stem weakness, and blossom end rot while promoting steady flowering in vegetable crops and garden lawns.
This completely soluble formula integrates cleanly into soil, coco coir, and hydroponic circuits without residue. Dose one-quarter teaspoon per gallon and apply weekly as a base drench from seedling through bloom. The solution remains non-toxic, food-crop safe, and fully compatible with standard nutrient schedules without requiring foliar application.
📋 Product summary:
- Delivers 2.5% calcium and 1.0% magnesium plus six targeted micronutrients for complete nutritional balance
- Reinforces plant cell architecture to minimize blossom end rot, weak stems, and nutrient lockout
- Accelerates uptake efficiency of nitrogen, phosphorus, and potassium throughout every growth phase
- Functions reliably in soil beds, coco coir matrices, hydroponic channels, and aquaponic tanks
- Rated safe for edible harvests, ornamental turf, and indoor potted specimens at all developmental stages
- Requires straightforward measuring using one-quarter teaspoon per gallon of reservoir water for weekly application
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🇺🇸 Free shipping nationwide
🇺🇸 Free shipping nationwide
Some free shipping products may be limited to the lower 48 states. All of the shipping estimator tools and the checkout cart will notify you of such a result.
📦 Shipping policy & returns
📦 Shipping policy & returns
NATIONWIDE SHIPPING:
Some free shipping products may be limited to the lower 48 states, as indicated by our shipping estimator tools and checkout cart. Outdoor living, home, and garden items ship nationwide. Standard shipping fees are confirmed at checkout based on your address and provider selection. Free shipping items incur zero fees at checkout. Tracking details are emailed instantly upon order fulfillment.
NATIONWIDE SHIPPING RETURNS: 30 day returns.
We accept returns of unused products that are defective or not defective. Your return must be processed within 30 days of the date of purchase. We do not process exchanges. We will provide a shipping label by email, you are responsible for bringing the return to the shipping provider.
FREIGHT PRODUCT RETURNS: no returns or exchanges.
There are no returns, exchanges or refunds for products delivered via freight. REFUNDS: The cost of the return shipping and a 6% credit card processing/restocking fee will be deducted from your refund amount. The refund balance will be distributed to you once the returned product is received and processed.
NATIONWIDE PRODUCT REFUNDS:
The cost of the return shipping and a 6% credit card processing/restocking fee will be deducted from your refund amount. The refund balance will be distributed to you once the order is canceled and the returned product is received and processed.
Let customers speak for us
Great product and delivery
Really nice soil and awesome service
Never used because I ordered the wrong Water Filter. Mike was very helpful with the return and refund. Excellent Customer Service.
Great service. Soil is what I wanted and it off loaded exactly where I asked.
Plants are doing really well with this soil. Deep and rich looking soil, plants seem really happy. Much more cost effective (and no plastic bag waste) compared to buying bags of soil mix from a store.
The quality of the craftsmanship is superb! My formula one fan absolutely loves it!!!!
Worked like an absolute charm!
These markers were perfect for ones that we were replacing. The quality is great and they seem sturdy. The gold detail stands out and is visible from a distance. Shipping was very fast.
Good solution. The little flies have disappeared. We were sure to mist/moisten the surface of each plant once a day for 4 or 5 days, after the initial application of the nematodes, to keep the little guys mobile and able to get to any remaining eggs. So, go for it!
Plant was well packed and shipment was very fast. Received a very nice fully rooted plant in the pot!
The organic garden soil is doing very well in my garden bed. The company was professional, nice, and accommodating to my needs. They provide many types of things for your landscaping at a reasonable price.
Product was delivered promptly and the quality of the product was very good, as hoped for. I was thrilled to receive the product so quickly! Thank you!
