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Flowering Plant Food

Feed your flowering annuals and perennials with our liquid Flowering Plant Food, made for bedding plants, patio containers and mixed garden borders. It supplies supplemental nutrition for the stems, buds and blooms a flowering plant produces through its season. Mix it with water and feed as part of regular care.

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Free shipping1M+ Bottles SoldMade in Seattle

When your flowering plants may benefit from feeding

  • When actively growing bedding flowers start producing healthy new shoots and buds
  • When frequently watered flowering containers need nutrient replacement during their main bloom season
  • When reblooming annuals are growing after light deadheading and the soil has a verified nutrient need
  • When a mixed flowering garden has low available nutrients and the 3-3.6-5.1 blend fits the feeding plan

Light, temperature, and variety control flowering as much as nutrition; don't exceed the labeled rate or assume more fertilizer will force buds.

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 anything that blooms

  • Petunias
  • Geraniums
  • Roses
  • Hibiscus
  • Marigolds
  • Impatiens
  • Begonias
  • African Violets

How to use

  1. Watering can

    2 Tbs (30 mL) per gallon of water

    Spring & summer: every 1–2 weeks · Fall & winter: every 4 weeks

  2. Hose end sprayer

    Set dial to 1 oz (30mL) setting

    Apply every 1-2 weeks in spring and summer

  3. Leaf misting (optional)

    1 tsp per quart (32 oz) of water

    Spray on leaves every 1-2 weeks

What's inside
A 3-3.6-5.1 ratio built for continuous flowering. Potassium leads at 5.1%, moving sugars into buds and managing the water pressure that keeps petals turgid — the difference between blooms that hold for days and blooms that collapse in an afternoon. Phosphate at 3.6% feeds bud formation, the step that determines how many flowers you get at all. Nitrogen sits at a deliberate 3%, all of it nitrate nitrogen — absorbed directly by roots, fast-acting with low burn risk — enough to keep leaves green and photosynthesizing, since a flowering plant still runs on foliage, but not so much that it stops setting buds and starts making leaves.

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. Boron and calcium are the two heavy bloomers run short of first — boron is essential to pollen viability and bud development, and a shortage shows up as buds that abort or open malformed rather than as anything visible in the leaves.

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 8 gallons of feed at 2 Tbs per gallon — the 32 oz makes 32.

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

Frequently asked questions

How often should I feed flowering plants?

Flowering Plant Food is made for continuous feeding through the bloom season, because a plant that keeps setting buds keeps drawing on phosphate, potassium, calcium and boron. Mix 2 tablespoons per gallon of water and apply every 1–2 weeks in spring and summer, dropping to every 4 weeks in fall and winter. A hose-end sprayer on the 1-ounce setting covers beds and hanging baskets quickly, and you can mist leaves with 1 teaspoon per quart every 1–2 weeks. Containers want the frequent end of that range.

Why do my hanging baskets stop blooming mid-summer?

Usually nutrient exhaustion combined with spent flowers. Baskets are watered daily in heat, and every watering carries nutrients out of the pot, so the potting mix is empty within weeks of purchase. Flowering Plant Food at 2 tablespoons per gallon replaces what washes through, with potassium and phosphate weighted toward the buds. Pair it with deadheading: many annuals stop flowering once they set seed, so removing spent blooms keeps them producing. Both matter, and neither works alone.

Why does my plant have leaves but no flowers?

Two usual causes, and neither is a shortage of bloom fertilizer. Too much nitrogen, from lawn feed drift or an all-purpose fertilizer, keeps a plant in leaf mode; that is why Flowering Plant Food holds nitrogen at 3% and leads with phosphate at 3.6% and potassium at 5.1%, enough to keep the leaves green without pushing foliage over buds. The other cause is light: most flowering plants need real sun to set buds, and nothing you feed them substitutes for it.

Is this a complete fertilizer or a bloom booster?

A complete feed. Flowering Plant Food carries 3% nitrate nitrogen alongside 3.6% phosphate and 5.1% potash, so it can be a flowering plant's only fertilizer through the season, feeding foliage and buds together. A booster with no nitrogen is a top-up for plants already on a complete feed. If you want one bottle for your flowers, this is the one.

Can I use this on flowering houseplants?

Yes. African violets, anthurium, peace lilies, Christmas cactus and orchids in bloom all benefit from a bloom-weighted feed, and Flowering Plant Food gives them the same potassium- and phosphate-led nutrition it gives outdoor annuals. Use the same 2 tablespoons per gallon and follow the seasonal schedule, easing off during a plant’s natural rest after flowering. Species with unusual needs, such as orchids in bark or carnivorous plants, do better on formulas built specifically for them.

When will I see results?

All the nitrogen in Flowering Plant Food is nitrate, which roots absorb directly, so it starts working with the first watering. Plants already carrying buds respond fastest: better color and longer-lasting blooms within 1–2 weeks, as the potassium helps petals hold their water pressure. New bud production takes longer. Expect a visible increase in flower count over 3–5 weeks of regular feeding, since your flowering plant has to initiate those buds before it can open them.

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Flowering Plant Food 8oz $11.99