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Butterfly Bush Fertilizer

Support the seasonal growth of your butterfly bush with liquid Butterfly Bush Fertilizer. It gives actively growing shrubs a convenient way to receive supplemental nutrients for healthy leaves, branching stems, and the growth associated with summer flower clusters. Use it for an established garden shrub or a suitable container when additional feeding fits your soil and the plant's growing season.

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Free shipping1M+ Bottles SoldMade in Seattle

When your butterfly bush may benefit from feeding

  • When new spring shoots are emerging and soil nutrients are genuinely limited
  • When a container butterfly bush needs replenishment after frequent watering
  • When repeat flowering growth is active and soil testing indicates a nutrient need
  • When an established shrub has limited vigor after sunlight and drainage issues are excluded

More fertilizer does not ensure more flowers; check local restrictions on invasive Buddleja species

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 butterfly bush varieties

  • Black Knight
  • Pugster Blue
  • Miss Molly
  • Royal Red
  • Nanho Blue
  • Pink Delight
  • White Profusion
  • Lo & Behold
  • Butterfly Candy
  • Butterfly Bush

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.

How to care for a butterfly bush

Light

Full sun, six or more hours a day. Shade gives you long floppy stems and few flowers, and it keeps pollinators from finding your butterfly bush.

Water

Water weekly through the first season while roots settle in. After that a butterfly bush handles dry spells well, and soggy soil is far more of a threat than drought.

Soil

Average, well drained soil near pH 6.0 to 7.0. It does not need rich ground, but it will not tolerate heavy clay that holds water through winter.

Feeding

Feed from spring through midsummer while new growth pushes, mixing Butterfly Bush Fertilizer into your watering. Stop by late summer so your butterfly bush can slow down before frost.

Pruning

Cut the whole shrub back to about twelve inches in late winter or early spring. Flowers form on new wood, so that hard cutback is what drives the season.

Bloom

Flowering runs from midsummer into fall. Snip spent spikes back to the next set of buds every week or two and fresh spikes keep coming behind them.

Frequently asked questions

Why isn't my butterfly bush blooming much?

Too much shade and too much nitrogen are the two common causes. Butterfly bush flowers on new wood and needs full sun to do it, so a shrub in partial shade will grow but bloom sparsely. Heavy nitrogen pushes leafy stems at the expense of flower spikes. Butterfly Bush Fertilizer is formulated to support blooming, so feed at the recommended dilution rather than heavier, and deadhead spent spikes so your butterfly bush keeps setting new ones through summer.

How often should I feed my butterfly bush?

Every 1–2 weeks in spring and summer while it is actively growing and flowering, then every 4 weeks in fall and winter. Butterfly Bush Fertilizer is a liquid, so each feeding is available to the roots immediately, and a light, regular cadence keeps your shrub supplied through its long bloom season without a heavy dose at any one time. Mix it into your regular watering at the recommended dilution and it fits into the routine you already have.

Should I feed it after cutting it back in spring?

Yes. Butterfly bush is cut hard in early spring, and it rebuilds almost the entire plant from that framework before it flowers in summer. Feeding as the new shoots emerge supports that fast regrowth, which is what carries the bloom. Start Butterfly Bush Fertilizer once you see new growth breaking from the stubs, and continue every 1–2 weeks through the season. There’s no need to feed a dormant plant before it wakes.

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

Yes. Butterfly Bush Fertilizer is mixed at the same dilution for both; only the delivery changes. A watering can suits a container plant or a small bed, and a hose-end sprayer set to the recommended rate covers larger in-ground shrubs in one pass. Container plants lose nutrients every time they drain, so keep them closer to the regular schedule, while an established shrub in the ground has more reserve to draw on.

Will this burn my plants?

Butterfly Bush 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 shrub. Mixed at the recommended dilution and applied every 1–2 weeks in the growing season, the nutrients arrive in solution at a strength the roots take up as they water. If you ever overdo a mix, water the area thoroughly with plain water.

When will I see results?

Foliage responds first. New shoots typically come in greener and stronger within two to four weeks of consistent feeding, since a liquid is available to the roots right away. Flowering follows your butterfly bush's own timetable: Butterfly Bush Fertilizer supports the regrowth that carries the summer bloom, so the benefit shows as the season builds, with more spikes and steadier flowering through summer when your shrub is in full sun and deadheaded regularly.

Let's Start Growing!

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Butterfly Bush Fertilizer 8oz $11.99