Pumpkin Fertilizer
Support vigorous vines and healthy pumpkin development with a liquid fertilizer made for pumpkins. It provides consistent nutrition for healthy growth while keeping plant care straightforward.
The liquid formula fits into regular watering, making consistent feeding easy for everyday plant care.
Why You'll Love It
- Steady Growth Supports vigorous vines that can carry a heavy pumpkin.
- Fruit Development For vines running leafy with few or no pumpkins forming.
- Bloom Support For flowers that open and drop without ever setting fruit.
Made by growers
More than a bottle on a shelf.
- Talk to real plant people. The team that mixes the formula answers your email.
- Made in-house, in the USA. Every bottle mixed and filled by us, not a third party.
- We're growers, not resellers. We use this on our own plants before it ships.
- Bundle savings only here. Pair any two TPS formulas — your order ships free.
Liquid pumpkin fertilizer with a 3-3.6-5.1 NPK plus kelp. Supports vigorous vines and big, heavy pumpkins.
How to Use Pumpkin Fertilizer
| Method | Amount | How Often |
|---|---|---|
| Watering can (plants under 12") | 1 Tbs (15 mL) per gallon of water | Weekly through the growing season |
| Watering can (plants over 12") | 2 Tbs (30 mL) per gallon of water | Weekly through the growing season |
| Hose end sprayer | Set dial to above feedrates | Weekly through the growing season |
| Leaf misting (optional) | 1 tsp per quart (32 oz) of water | Every 1–2 weeks |
Mix into your normal watering — no separate feeding routine needed.
What's Inside
The 3-3.6-5.1 ratio is built for a fast, hungry vine crop that flowers heavily and sizes large fruit. Phosphorus at 3.6% and potassium at 5.1% both outweigh nitrogen at 3%, which shifts energy toward flowering and fruit once the vine is established — too much nitrogen early gives you huge leaves and few pumpkins. All of the nitrogen is nitrate nitrogen, the form roots absorb directly, so response is fast under the weekly feeding pumpkins want.
Beyond NPK: sea kelp (Ascophyllum nodosum) for natural growth compounds, plus calcium at 2.1% — unusually high, and what firms the developing fruit and supports the fast vine growth big pumpkins need — magnesium (0.75%), iron, manganese, zinc, boron, and copper. Steady potassium and calcium through fruit development are what carry a pumpkin from set to full size.
Made For
Every pumpkin: carving and jack-o'-lantern types, pie and sugar pumpkins, giant competition varieties like Atlantic Giant, and ornamental mini and specialty pumpkins — plus winter squash and gourds, which grow and feed the same way.
Problems It Solves
- Big leafy vines but few or no pumpkins forming
- Flowers that open and drop without setting fruit
- Small pumpkins or fruit that stops sizing up
- Yellowing leaves and slow vine growth
FAQs
How often should I feed my pumpkins?
Once weekly through the growing season, using 1 Tbs per gallon for young plants under 12 inches and 2 Tbs per gallon for larger vines. Pumpkins are heavy, fast feeders, and consistent weekly feeding is what supports the vine growth and fruit sizing that big pumpkins need.
My plant has lots of flowers but no pumpkins forming — why?
Pumpkins produce separate male and female flowers, and only the female ones (with a tiny pumpkin at the base) become fruit. Early in the season a plant often opens only male flowers, and fruit won't set until females appear and get pollinated. If bees are scarce, hand-pollinating with a male flower ensures the females set — this, not fertilizer, is the usual fix for 'no pumpkins.'
How do I grow bigger pumpkins?
Feed weekly, water deeply and consistently, give the vine plenty of room and sun, and for the largest fruit, thin to one or two pumpkins per vine so the plant's energy goes into sizing them rather than many small ones. This formula's potassium and calcium support fruit development, but thinning and steady water are just as important for size.
Will this burn my plants?
No — at the directed dilution, the formula is designed for weekly use all season. All-nitrate nitrogen and low salt concentration make burn very unlikely. For young seedlings, use the smaller-plant rate and step up as the vines grow.
When will I see results?
Vine growth and flowering respond within the first couple of weeks of feeding. Fruit sizing follows once pumpkins set and pollinate — consistently fed and well-pollinated plants produce more and larger pumpkins through the season.
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