Muriate Of Potash
Give plants targeted potassium support for strong roots, sturdy stems, flowering, fruiting, and overall resilience. Muriate of potash is designed for situations where growers want to add potassium without a full fertilizer blend.
Use it alongside your normal feeding program as directed rather than as a complete stand-alone fertilizer.
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Muriate of Potash with a 0-0-10 analysis plus sulfur — a straightforward, economical potassium feed with no nitrogen or phosphorus, made to support flowering, fruiting, and stress tolerance. Muriate of potash is the most widely used potassium source in gardening and agriculture, delivering 10% soluble potash to build fruit quality, sturdy stems, and a plant's resilience to heat, drought, and cold.
How to Use Muriate Of Potash
| Method | Amount | How Often |
|---|---|---|
| Watering can | 2 Tbs (30mL) per gallon of water | Spring & Summer: every 1-2 weeks |
| Watering can | Same dilution | Fall & Winter: every 4 weeks |
| Hose-end sprayer | Set dial to 1 oz (30mL) setting | Spring & Summer: every 1-2 weeks |
| Leaf misting (optional) | 1 tsp per quart (32 oz) of water, spray on leaves | every 1-2 weeks |
Use as a potassium supplement alongside your regular feeding, not in place of it — with no nitrogen or phosphorus, this targets potassium specifically.
What's Inside
The 0-0-10 analysis supplies potassium with no nitrogen or phosphorus, plus 2% sulfur. Muriate of potash is the traditional name for potassium chloride, the most common and economical potassium fertilizer in the world — potassium is the nutrient that regulates water movement in the plant, builds fruit quality and sweetness, strengthens stems and cell walls, and drives tolerance of heat, drought, and cold. Its 10% soluble potash makes it a direct way to correct a potassium shortfall or support fruiting.
Beyond NPK: this is a focused potassium feed, not a full-spectrum blend, so it carries no nitrogen, phosphorus, or micronutrient package. One thing worth knowing about muriate of potash is that it's chloride-based, which is fine and even beneficial for many crops, but salt-sensitive plants — some vegetables, berries, and potatoes — can be set back by chloride buildup over time. For those, sulfate of potash is the gentler choice; for general garden use and chloride-tolerant plants, muriate is the standard, cost-effective option. Use it alongside a complete fertilizer.
Made For
Built as an economical potassium supplement for the flowering and fruiting stage of chloride-tolerant plants — corn, many flowers, trees, and general garden crops — used alongside a complete fertilizer, with sulfate of potash the better pick for salt-sensitive edibles.
Problems It Solves
- Poor or low-quality fruit needing more potassium
- Scorching along the edges of older leaves
- Weak, floppy stems
- Plants struggling with heat, drought, or cold stress
FAQs
How often should I use muriate of potash?
During spring and summer, apply every 1-2 weeks with 2 Tbsp per gallon in a watering can, or use the hose-end sprayer on the 1 oz setting. In fall and winter, cut back to once every 4 weeks. Because it supplies potassium but no nitrogen or phosphorus, use it as a supplement alongside your regular complete feed, mainly during flowering and fruiting or to correct a potassium shortfall.
What's the difference between muriate and sulfate of potash?
Both supply potassium. Muriate of potash (potassium chloride) is the most common and economical source, chloride-based, and works well for the many crops that tolerate chloride. Sulfate of potash supplies potassium with sulfur and much less chloride, which suits salt-sensitive crops — some vegetables, berries, and potatoes — that chloride can set back. For general garden use and chloride-tolerant plants, muriate is the standard choice; for salt-sensitive edibles, sulfate is gentler.
What are the signs my plant needs potassium?
The classic sign is scorching or yellowing along the edges and tips of older, lower leaves while the centers stay green — potassium moves to new growth first, so deficiency shows on old leaves. Weak stems, poor fruit quality, and low stress tolerance are others. If you instead see uniform whole-leaf yellowing, that's nitrogen, and interveinal yellowing points to magnesium or iron, so match the pattern before treating.
Is muriate of potash safe for my garden?
Yes, for most plants used as directed — it's the world's most common potassium fertilizer for good reason. The one consideration is chloride: it's harmless and even useful for many crops, but salt-sensitive plants and gardens with already-salty soil can accumulate chloride over repeated heavy use. If you grow a lot of chloride-sensitive edibles or garden in salty or poorly drained soil, alternate with or switch to sulfate of potash. For general use at the labeled rate, it's a reliable choice.
When will I see results?
Potassium deficiency symptoms on existing leaves won't reverse, but new growth comes in stronger, and fruit developing after feeding shows better quality over the following weeks. Stem strength and stress tolerance improve gradually as the plant takes up potassium. The clearest results come across a full fruiting cycle of consistent feeding rather than immediately.