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Melon Fertilizer

Feed your melons from vine growth through fruit set with our liquid Melon Fertilizer, made for cantaloupe, honeydew and other garden melons in beds and large containers. It supplies supplemental nutrition for the broad leaves, long vines and swelling fruit of a crop that grows fast in warm weather. Mix it with water and feed through the season.

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Free shipping1M+ Bottles SoldMade in Seattle

When your melon plants may benefit from feeding

  • When young melon plants have established roots and begin vigorous vine growth
  • When developing vines are forming side shoots and healthy leaf cover
  • When pollinated melons begin swelling and the soil nutrient plan calls for replenishment
  • When container-grown melons are actively fruiting and their limited soil volume needs nutrients

Melon fruit set depends on pollination and temperatures; excessive nitrogen may favor vines over fruit.

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 melon varieties

  • Cantaloupe
  • Honeydew
  • Galia Melon
  • Charentais Melon
  • Crenshaw Melon
  • Canary Melon
  • Casaba Melon
  • Muskmelon
  • Melon

Label facts

NPK 3-3.6-5.1 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.

How to care for melons

Light

Full sun, eight hours or more. Melons build their sugar from heat and light, and vines in shade tend to set fruit that ripens bland.

Water

One to two inches a week at the base of your melon plant, steady while vines run and fruit sizes. Ease off as melons near ripeness so they do not split.

Soil

Warm, well-drained soil enriched with compost, pH 6.0 to 6.8. Plant on low mounds or raised rows, and wait until the soil reaches about 70F.

Feeding

Feed Melon Fertilizer every two weeks from transplanting through flowering and fruit set, mixed into your normal watering. Taper off as the melons finish sizing and begin ripening.

Temperature

Melons want days in the 70s to 90s F and dislike nights under 50F. Black plastic or fabric mulch warms the bed in short-season gardens.

Harvest

Cantaloupe slips from your vine under gentle pressure and smells sweet at the stem. Honeydew and charentais do not slip: pick when the rind turns creamy and slightly soft.

Frequently asked questions

How often should I feed melons?

Melon Fertilizer is meant to feed from the time your vines start to run through flowering and fruit set. Apply every 1 to 2 weeks at the recommended dilution, mixed into your regular watering, while your melons are growing and setting fruit. Once melons reach full size and begin to ripen, ease off: heavy feeding and watering late in the cycle can dilute flavor, and your melon plant's work at that point is moving sugar into the fruit rather than growing new vine.

How often should I feed my melon?

Every 1 to 2 weeks in spring and summer while your melon plant is actively growing. Mix Melon Fertilizer into your regular watering at the recommended dilution so feeding never becomes a separate task. Melons are heavy feeders during the vining and fruit-set stage, so consistent feeding through that window matters more than the occasional large dose; taper off as the fruit ripens.

Why are my melons bland?

Too much water and nitrogen during ripening, most often. Nitrogen keeps a plant making vine and leaves, and heavy watering late on swells the fruit with water rather than sugar, so the flavor thins out. Feed Melon Fertilizer through vining and fruit set, when your melon plant is building its canopy and its crop, then cut back on both feeding and watering once fruit reaches full size. Let the melons ripen in full sun and warm soil; that final dry, sunny stretch is where the sweetness comes from.

Can I use it on potted and in-ground plants?

Yes. Melon Fertilizer is a liquid, so the same dilution serves both; what changes is the delivery. A watering can suits containers, grow bags and small beds, where potting mix loses nutrients with every watering and benefits most from a regular feed. For larger in-ground plantings, a hose-end sprayer set to the recommended rate covers a sprawling melon patch quickly. Either way, apply every 1 to 2 weeks from vining through fruit set, then ease off as the fruit ripens.

Will this burn my plants?

Melon Fertilizer is a dilute liquid feed, and dilution is what matters here. Fertilizer burn happens when concentrated salts sit against the roots: too much product in too little water, or granules piled at the base of a plant. Mixed at the recommended dilution and applied every 1 to 2 weeks during the growing season, the nutrients arrive in solution across the whole root zone at a strength the roots take up as they water. Keep to that mix, and if you ever overdo it, flush the soil with plain water.

When will I see results?

Greener leaves and stronger vine growth show within a few weeks, since a liquid feed is available to the roots with the first watering. The results you’re really growing for come later: fruit set and fuller sizing build across the season on the every 1 to 2 week schedule, and they’re most visible at harvest. Feeding consistently from vining through fruit set, then easing off as the melons ripen, is what carries that improvement through to flavor.

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Melon Fertilizer 8oz $11.99