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Vegetable Fertilizer

Feed your vegetable garden through the season with our liquid Vegetable Fertilizer, made for mixed vegetable beds, raised beds and containers. It supplies supplemental nutrition for leafy growth, flowering and the fruit and roots you harvest, in one formula that suits most garden crops. Mix it with water and feed as plants grow.

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Free shipping1M+ Bottles SoldMade in Seattle

When your vegetable garden may benefit from feeding

  • When fast-growing leafy vegetables are actively forming new leaves and soil nutrients are limited
  • When fruiting crops begin sustained growth and available nutrients may need replenishment
  • When raised-bed soil has been heavily cropped over successive plantings and a soil test supports feeding
  • When vegetables in containers are actively growing and frequent watering is washing nutrients from the mix

Use soil-test and crop-specific guidance; excess nitrogen can favor leaves over fruit, and fertilizer cannot correct poor pollination or pest damage.

Results you can see

Feeds foliage for deeper color and a brighter, more lively look.

Feeds foliage for deeper color and a brighter, more lively look.

Encourages fresh leaf and stem growth for a fuller, thriving plant.

Encourages fresh leaf and stem growth for a fuller, thriving plant.

Supports healthy, resilient roots that absorb nutrients more effectively.

Supports healthy, resilient roots that absorb nutrients more effectively.

Works for the whole vegetable garden

  • Tomatoes
  • Peppers
  • Cucumbers
  • Squash
  • Beans
  • Lettuce
  • Carrots
  • Corn

How to use

  1. Watering can — plants under 12 inches

    1 Tbs (15 mL) per gallon of water

    Feed once weekly through the growing season

  2. Watering can — plants over 12 inches

    2 Tbs (30 mL) per gallon of water

    Feed once weekly through the growing season

  3. Hose end sprayer

    Set dial to the above feed rates

    Feed once weekly through the growing season

  4. Leaf misting (optional)

    1 tsp per quart (32 oz) of water

    Spray on leaves every 1-2 weeks

What's inside
A 3.6-3-5.1 ratio built for the shift every vegetable plant makes. Early on, nitrogen at 3.6% — all nitrate nitrogen, the form roots absorb directly, fast-acting with low burn risk — builds the leaf canopy that powers everything after it. Then the balance matters: potassium at 5.1% takes over during fruiting, moving sugars into tomatoes, peppers, and squash and driving sizing in carrots and onions, while nitrogen stays moderate enough that plants don't keep making leaves instead of fruit. Phosphate at 3% supports flowering and the root systems that carry a crop through a long season.

Beyond NPK: sea kelp (Ascophyllum nodosum) for natural growth compounds, plus calcium at an unusually high 2.1% and 0.75% magnesium, with iron, manganese, zinc, boron, and copper. Calcium and magnesium are the two vegetable beds run short of first — calcium builds the cell walls behind firm, crack-resistant fruit, and magnesium drives chlorophyll, which is why heavy feeders like tomatoes yellow between the veins on lower leaves right when they're loading fruit.

Label facts

NPK 3.6-3-5.1 with 2.1% calcium and 0.75% magnesium, plus iron, manganese, zinc, boron and copper.

Derived from kelp (ascophyllum nodosum), potassium phosphate, potassium nitrate, calcium nitrate, magnesium nitrate, boric acid, copper sulfate, ferric sulfate, manganese sulfate, zinc sulfate.

One 8 oz bottle makes 16 gallons of feed at 1 Tbs per gallon — the 32 oz makes 64.

Store cool and dark. Guaranteed 12 months from purchase; keeps up to 2 years.

Frequently asked questions

How often should I fertilize vegetables?

Vegetable Fertilizer is built for once-weekly feeding through the growing season, dosed by plant size. Mix 1 tablespoon per gallon of water for plants under 12 inches, and move to 2 tablespoons per gallon once they’re taller; the same tomato plant steps up as it grows. A hose-end sprayer set to those rates covers rows quickly. Weekly feeding at a moderate rate suits vegetables better than occasional heavy doses, especially in containers and grow bags, where nutrients flush out with every watering.

Why are my tomato plants huge with no tomatoes?

Almost always excess nitrogen, often from lawn fertilizer drifting into the bed or a high-nitrogen all-purpose feed. Nitrogen tells a plant to make leaves, and a tomato sets fruit when it isn’t being pushed to keep growing. Vegetable Fertilizer keeps nitrogen moderate at 3.6% and leads with potassium at 5.1% for that reason, so your plant has what it needs for fruit rather than more vine. Heat also matters: temperatures above roughly 90°F cause blossom drop, and no fertilizer overrides a heat wave.

Why do my tomatoes have black bottoms?

That’s blossom-end rot, and it’s a watering problem rather than a fertilizer shortage. Calcium moves into developing fruit with water, so when soil moisture swings between soaked and bone dry the fruit can’t take it up even when the soil has plenty. Water consistently and mulch to even out moisture. Vegetable Fertilizer carries calcium at 2.1%, which supports the supply side and builds the cell walls behind firm fruit, but steady watering is what actually delivers it to the tomato.

Can I use this on leafy greens and root crops too?

Yes. The balance in Vegetable Fertilizer is what lets one bottle serve a whole garden. Greens draw mainly on nitrogen and respond quickly to weekly feeding, while carrots, onions and potatoes lean on potassium and phosphate to size up underground, and the 3.6-3-5.1 ratio supplies both without pushing either off course the way a strongly lopsided formula would. For greens you harvest continuously, weekly feeding at 1 tablespoon per gallon keeps regrowth coming. Root crops move to 2 tablespoons once the tops pass 12 inches.

Is it safe for vegetables I'm going to eat?

Yes. Vegetable Fertilizer supplies the same minerals crops draw from any garden soil, taken up through the roots and built into leaves, roots and fruit. Mix at 1 or 2 tablespoons per gallon depending on plant size, avoid contact with skin and eyes while mixing, and wash produce before eating as you normally would. If you use the optional leaf misting, apply it earlier in the growth cycle rather than right before picking. The product itself is not for human or animal consumption.

When will I see results?

Vegetable Fertilizer starts working with the first watering, since all of its nitrogen is nitrate and absorbed directly by the roots. Expect deeper green within 1 to 2 weeks. The results that matter take longer: better flowering, fruit set and sizing build over 3 to 5 weeks of weekly feeding, and the calcium and magnesium in the formula head off the between-vein yellowing and soft fruit that heavy feeders show mid-season. The clearest difference tends to show in midsummer, when unfed gardens start to fade.

Let's Start Growing!

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Vegetable Fertilizer Quart $24.99