Is Elemental a complete fertilizer?

No. Its NPK is 0.25-0-0.1, so it supplies calcium, magnesium and sulfur only. Run it alongside a base nutrient program.

Can I use it as a foliar spray?

Yes. It is listed for foliar application as well as soil, but mix it thoroughly and spray at a strength your plants tolerate.

How much does 3 lb cover?

Coverage depends on dose and pot size. At typical calmag rates a 3 lb bag lasts several feeding cycles in a small garden.

Is it good for hydroponics?

It is formulated for soil. Coco and hydro growers usually do better with a liquid calmag made for those systems.

When is the best time to add it?

Use it when plants show calcium or magnesium symptoms, or as a preventive dose during fast growth in veg and early flower.

What is the best price?

$45.38 for 3 lb at SERES as of November 6, 2026, the lowest of four new prices.

Where is the Roots Organics Elemental cheapest?

At SERES, for $45.38, as of our latest check.

What do buyers say about the Roots Organics Elemental?

Rated 5 out of 5 from 74 ratings.

Where can I buy the Roots Organics Elemental?

13 stores we checked sell it, including HTG Supply, SERES, Perris Hydroponics, Walmart, eBay.

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Roots Organics Elemental

Best price now

$45.38at SERESObserved at 9:57 PM

Compared across 4 stores. Prices are checked against each store and labelled with when.

Visit SERES

Roots Organics Elemental

Best price now

$45.38at SERESObserved at 9:57 PM

Compared across 4 stores. Prices are checked against each store and labelled with when.

Visit SERES

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Our take on the Roots Organics Elemental

Roots Organics Elemental is a dry calcium-magnesium supplement for soil grows, built from gypsum, calcitic lime, dolomitic lime and fish protein hydrolysate. Its NPK is only 0.25-0-0.1, so it is a mineral and sulfur top-up rather than a standalone feed. It suits growers who already have a base nutrient line and want to correct calcium or magnesium shortfalls. At $45.38 for 3 lb at SERES as of November 6, 2026, it is the lowest of four new prices and a modest outlay for a full run.

Best forSoil growers running a base nutrient lineCorrecting calcium or magnesium shortfallsFast-growing heavy feeders in veg and early flowerGrowers who prefer dry amendments over bottled calmag

Pros

Combines calcium, magnesium and sulfur in one dry product
Low NPK adds minerals without pushing nitrogen
Works as a soil amendment or a foliar spray
3 lb bag covers many feeding cycles
Rated 5 out of 5 from 74 ratings

Cons

Not a complete fertilizer; needs a base nutrient program
Dry powder needs measuring and dissolving care
Foliar use adds a separate mixing step
Little use in hydroponic or coco setups

Roots Organics Elemental prices at every store

SERESNew
In stock
$45.38Observed at 9:57 PM
Visit SERES
HTG SupplyNew
In stock
$45.94Observed at 10:33 PM
Visit HTG Supply
Perris HydroponicsNew
In stock
$48.99Observed at 9:57 PM
Visit Perris Hydroponics
WalmartNew
In stockSold by TOLLAA
$96.08Observed at 9:57 PM
Visit Walmart

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Gardin WarehouseCheck price at Gardin Warehouse
Grow MastersCheck price at Grow Masters
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Matts HydroponicsCheck price at Matts Hydroponics

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Roots Organics Elemental price history

Lowest price we've seen: $45.38 on Nov 7 at SERES. Tracked across 12 stores since Nov 7.

What reviewers say

5 / 574 ratings

Buyers rate it 5 out of 5 across 74 ratings and treat it as a reliable calmag fix in soil. The main friction points are mixing the dry powder and remembering it is a supplement, not a full feed.

What people mention

Cal-mag fixPraisedOwners say it clears calcium and magnesium deficiencies in soil grows.
MixingMixedThe dry powder dissolves well enough but can clump and needs stirring.
ValuePraisedA 3 lb bag lasts several cycles, which buyers see as good value.
Not a feedCriticisedSome buyers expected a complete fertilizer and found it only supplements a base line.

Specifications

Type: Macronutrient and micronutrient supplement
Primary Use: Fertilizer, Supplement
Form: Soluble, Dry form of a cal-mag boost, Dry supplement
NPK Ratio: 0.25-0-0.1
Micronutrients: Sulfur
Quantity: 3 lb
Size: 9 lb

Questions and answers

Is Elemental a complete fertilizer?: No. Its NPK is 0.25-0-0.1, so it supplies calcium, magnesium and sulfur only. Run it alongside a base nutrient program.
Can I use it as a foliar spray?: Yes. It is listed for foliar application as well as soil, but mix it thoroughly and spray at a strength your plants tolerate.
How much does 3 lb cover?: Coverage depends on dose and pot size. At typical calmag rates a 3 lb bag lasts several feeding cycles in a small garden.
Is it good for hydroponics?: It is formulated for soil. Coco and hydro growers usually do better with a liquid calmag made for those systems.
When is the best time to add it?: Use it when plants show calcium or magnesium symptoms, or as a preventive dose during fast growth in veg and early flower.
What is the best price?: $45.38 for 3 lb at SERES as of November 6, 2026, the lowest of four new prices.
Where is the Roots Organics Elemental cheapest?: At SERES, for $45.38, as of our latest check.
What do buyers say about the Roots Organics Elemental?: Rated 5 out of 5 from 74 ratings.
Where can I buy the Roots Organics Elemental?: 13 stores we checked sell it, including HTG Supply, SERES, Perris Hydroponics, Walmart, eBay.

Stores we've priced the Roots Organics Elemental at

Walmart deals and prices

Active Ingredients

Magnesium, Calcium

Ingredients

Magnesium, Calcium, Sulfur

Item Weight

3 lb

Dimensions

3.25 INH (height)

Suitable Application Site

Soil

Suitable Plant Type

Fast-growing plants

Typical Users

Expert growers

Container Size

3 lb

Container Type

Bag

Packaging Size

3 lb

Packaging Type

Bag

Application Method

Foliar Sprays

Included Materials

Gypsum, Calcitic Lime, Dolomitic Lime, Fish Protein Hydrolysate