Description
xGS Plant Foods Cal-Mag 420 Dry Super Concentrate offers a versatile calcium and magnesium nutrition option built for gardeners seeking reliable, scalable feeding. This completely water soluble powder dissolves readily into irrigation water or can be used as a foliar spray, providing flexibility for soil, coco, container, and hydro systems. The result is a ready-to-use solution that supports steady calcium and magnesium delivery across development stages, helping plants maintain strong cell walls and overall vitality without guesswork.
With a focus on ease and reliability, Cal-Mag 420 is designed to slot into a wide range of feeding routines. The powder dissolves quickly in water, forming a uniform solution that helps minimize variation between batches. This makes it simple for growers to maintain steady calcium and magnesium availability across diverse crops, from leafy greens to fruiting plants. The product is formulated to be compatible with a variety of growing media, reducing the need for multiple supplements in many programs.
What sets Cal-Mag 420 apart
- Makes up to 420 gallons of nutrient solution per container, delivering exceptional value for larger grows.
- Contains secondary nutrients in balanced amounts: Calcium 13%, Magnesium 3%, Sulfur 4%, and Nitrate Nitrogen 11%.
- Fully water soluble, enabling quick mixing and consistent distribution through irrigation lines or spray bottles.
- Suitable for all growth cycles and compatible with soil, coco, container, and hydroponic setups.
How to use
- Measure with the included scoop and add to water to create your nutrient solution.
- Mix thoroughly until the powder is fully dissolved, then apply via irrigation or foliar spray as needed.
- Use across growth stages, adjusting frequency based on plant response and environmental conditions.
- Store sealed in a cool, dry place to preserve solubility and potency.
Practical considerations
- Designed to support a balanced calcium-magnesium supply, which can help with structural integrity and nutrient uptake in a variety of crops.
- Coexists with widely used growing media, reducing the need for multiple supplements in many programs.
Product specifics
- Size: 18 ounces
- Yield: up to 420 gallons of nutrient solution per container
- Composition: Total Nitrogen 11.0%, Nitrate N 11.0%, Calcium 13.0%, Sulfur 4.0%, Magnesium 3.0%
- Solubility: 100% water soluble powder
FAQ
Q: What is GS Plant Foods Cal-Mag 420 Dry Super Concentrate used for?
A: A dry, water-soluble Cal-Mag fertilizer that supplies calcium, magnesium, and secondary nutrients across growth stages.
Q: How much nutrient solution does one 18-ounce container produce?
A: It yields up to 420 gallons of nutrient solution when mixed according to directions.
Shipping & Return
xReturn Policy
We offer a 30-day return policy, which means you have 30 days after receiving your item to request a return. For Patio, Lawn & Garden items, returns are only accepted for products that arrive damaged, defective, incorrectly shipped, or in a condition that is the fault of the seller.
To be eligible for a return, your item must be in the same condition that you received it — unused, with all original packaging, tags, manuals, parts, and accessories included. Items that show signs of use, installation, outdoor wear, assembly, or damage caused after delivery cannot be returned.
You will also need your receipt or proof of purchase.
To start a return, contact us at gardencanada.ca@gmail.com
All approved returns must be sent to the following address:
Garden Canada – Returns Department
2601 E 28th St, STE 005
Signal Hill, California
United States
If your return is accepted, you will receive a prepaid return shipping label (when applicable) along with detailed instructions on how and where to send your package.
Items sent back without first requesting a return will not be accepted.
You can always reach us at gardencanada.ca@gmail.com for any return-related questions.
Damages and Issues
Please inspect your order upon delivery and contact us immediately if your item is damaged, defective, incorrect, broken, missing parts, or arrives in poor condition. We will evaluate the issue and make it right.
For seller-caused issues (damaged, defective, incorrect), Garden Canada will cover the return shipping cost.
Exceptions / Non-Returnable Items
The following items cannot be returned:
- Used or installed Patio, Lawn & Garden products
- Items showing signs of outdoor use, wear, dirt, or weather exposure
- Plants, seeds, bulbs, fresh flowers, and other perishable goods
- Products returned without original packaging, parts, manuals, or accessories
- Assembled furniture or products damaged during customer assembly
- Customized or personalized items
- Hazardous materials or flammable liquids
- Sale or clearance items
- Gift cards
If you are unsure about your item’s return eligibility, please contact us before sending it back.
Exchanges
Exchanges are only available for unused items that arrived damaged, defective, or incorrect. The fastest way to receive the item you want is to return the original (if eligible) and place a new order once your return is approved.
European Union 14-Day Cooling-Off Period
If your order is shipped into the European Union, you have 14 days to cancel or return the item for any reason. However, Patio, Lawn & Garden items must still be unused, in original condition, and in their original packaging with all included parts and accessories.
Refunds
Once we receive and inspect your return, we will notify you whether the refund was approved. If approved, your refund will be processed to your original payment method within 10 business days.
Please note that your bank or credit card provider may require additional time to process and post the refund.
If more than 15 business days have passed since your refund was approved, please contact us at gardencanada.ca@gmail.com
ORDER PROCESSING TIME
All orders are processed within 2–3 business days after payment confirmation. Orders placed on weekends or holidays will be processed on the next business day.
If there is any delay in preparing your order, we will notify you promptly by email.
SHIPPING TIME
Garden Canada ships exclusively within Canada across all provinces and territories.
Standard delivery: Total delivery time is approximately 5 business days (2–3 business days processing plus delivery time).
Remote or northern regions: 6–10 business days due to distance, weather conditions, and limited carrier routes.
Deliveries to areas such as Yukon, Northwest Territories, Nunavut, and certain rural communities may take longer because of seasonal and logistical factors.
While we always aim for timely deliveries, once a package is handed over to the carrier, Garden Canada is not responsible for carrier delays, service interruptions, or weather-related disruptions.
SHIPPING CONFIRMATION AND TRACKING
Once your order has shipped, you will receive a shipping confirmation email containing your tracking number and a link to track your shipment.
Tracking details typically become active within 24–48 hours after shipment.
SHIPPING RATES
Shipping within Canada is free on all orders.
Expedited or express delivery options may be available at checkout for an additional fee depending on your location.
ADDRESS ACCURACY
Please ensure your shipping address is complete and accurate before placing your order. Garden Canada is not responsible for delays, lost shipments, or delivery issues caused by incorrect or incomplete address information.
DAMAGED OR LOST PACKAGES
If your order arrives damaged, please contact us immediately at gardencanada.ca@gmail.com with clear photos of the package and its contents. We will review the situation and assist you as quickly as possible.
If your package is marked as “delivered” by the carrier but you have not received it, please first:
- Check with neighbors or building management
- Verify the shipping address used during checkout
- Contact your local delivery office
If the issue remains unresolved, please email us and we will help initiate a carrier inquiry or claim when applicable.
INTERNATIONAL SHIPPING
At this time, Garden Canada ships only within Canada. International shipping options may become available in the future.
CONTACT
If you have any questions regarding shipping, please contact us at: gardencanada.ca@gmail.com
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