Potassium Fertilizer
Liquid potassium fertilizer for stronger stems, better blooms and fruit, and improved stress tolerance. Provides targeted potassium feeding when plants need additional support for roots, flowers, or crops.
Use it as a targeted supplement alongside your normal feeding program, following the label rate so you can add the specific nutrition your plants need without complicating the routine.
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Potassium Fertilizer with a straight 0-0-10 analysis plus sulfur — pure potassium, no nitrogen or phosphorus, made to correct potassium shortfalls and strengthen plants for flowering, fruiting, and stress tolerance. Potassium is the nutrient behind fruit quality, sturdy stems, and a plant's ability to handle heat, drought, and cold, and this targets it directly without adding growth the plant doesn't need.
How to Use Potassium Fertilizer
| Method | Amount | How Often |
|---|---|---|
| Watering can | 1-2 tsp per gallon of water | Spring & Summer: apply once weekly |
| Watering can | Same dilution | Fall & Winter: every 4-8 weeks |
| Hose-end sprayer | Set to 2 tsp setting | Spring & Summer: apply once weekly |
| Leaf misting (optional) | 1 tsp per quart (32 oz) of water, spray on leaves | apply weekly |
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 is potassium alone — 10% soluble potash, with no nitrogen or phosphorus — for plants that specifically need more potassium. Potassium is the nutrient that regulates water movement, builds fruit quality and sweetness, strengthens stems and cell walls, and helps a plant tolerate heat, drought, and cold. A potassium shortfall often shows as yellowing or browning along the edges of older leaves, weak stems, or poor, low-quality fruit, and this feed targets exactly that.
Beyond NPK: sea kelp (Ascophyllum nodosum) for natural growth compounds that aid uptake, plus 1.0% sulfur. This is a deliberately focused potassium supplement, not a complete fertilizer — there's no added nitrogen, phosphorus, or micronutrient package. Use it to correct a potassium deficiency or to support fruiting and stress tolerance during the season, alongside a balanced fertilizer that covers the plant's other needs.
Made For
Built as a potassium supplement for fruiting and flowering plants and for correcting potassium deficiency — tomatoes, peppers, fruit, roses, and any plant showing scorched leaf edges or weak fruit — used alongside a complete fertilizer.
Problems It Solves
- Yellowing or browning along the edges of older leaves
- Weak, floppy stems
- Poor or low-quality fruit
- Plants struggling with heat, drought, or cold stress
FAQs
How often should I use potassium fertilizer?
In spring and summer, apply once weekly at 1-2 tsp per gallon, using a watering can or a hose-end sprayer on the 2 tsp setting. In fall and winter, cut back to every 4-8 weeks. Because this is straight potassium with no nitrogen or phosphorus, use it as a supplement alongside your regular complete feed, not as the only fertilizer, and only when a potassium boost is actually what the plant needs.
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 leaf centers stay green — potassium deficiency shows up on older growth first because the plant moves potassium to new growth. Weak stems, poor fruit quality, and low stress tolerance are others. If instead you see uniform yellowing of whole leaves, that points to nitrogen, and interveinal yellowing points to magnesium or iron, not potassium.
What does potassium do for plants?
Potassium regulates water movement in and out of cells, which drives everything from stem strength to drought and cold tolerance. It's central to fruit quality — size, sweetness, and color — which is why it matters so much for tomatoes, peppers, and fruit. It also helps plants resist stress and disease. Unlike nitrogen, it doesn't push leafy growth; it strengthens and matures the plant, which is why it's valued during flowering and fruiting.
Can I use this as my only fertilizer?
No — with 0% nitrogen and phosphorus, it isn't a complete feed. A plant fed only on 0-0-10 would run short on nitrogen for growth and phosphorus for roots and flowering. Use it to correct a potassium deficiency or to support fruiting during the season, paired with a balanced or nitrogen-containing fertilizer. It's a targeted supplement, not a standalone diet for the plant.
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 show across a full fruiting cycle of consistent feeding rather than immediately.
Related Products
Potash Fertilizer Phosphorus & Potassium Fertilizer Sulfate Of Potash