Hydrangea Fertilizer
Hydrangea food with a bloom-focused 3-3.6-5.1 NPK, kelp, and a full micronutrient package — made to feed hydrangeas from spring leaf-out through the whole flowering season. Higher phosphate and potash support bud set and bloom size, while calcium, magnesium, and iron keep foliage deep green instead of pale and washed out.
How to Use Hydrangea Fertilizer
| Method | Amount | How Often |
|---|---|---|
| Watering can | 2 Tbs (30 mL) per gallon of water | Spring & summer: every 1–2 weeks |
| Watering can | Same dilution | Fall & winter: every 4 weeks |
| Hose-end sprayer | Set dial to the 1 oz (30 mL) setting | Spring & summer: every 1–2 weeks |
| Leaf misting (optional) | 1 tsp per quart (32 oz) of water | Every 1–2 weeks |
Use a well-draining soil with some water retention, and keep it moderately moist — hydrangeas wilt fast when they dry out.
What's Inside
The 3-3.6-5.1 ratio (3% nitrogen, 3.6% phosphate, 5.1% potash) is bloom-forward — more phosphate and potash than nitrogen, so the plant puts energy into flowers rather than just leaves. All of the nitrogen is nitrate nitrogen, the form roots absorb directly, for faster response and lower burn risk than ammonium-heavy formulas.
Beyond NPK: sea kelp (Ascophyllum nodosum) for natural growth compounds, plus calcium (2.1%), magnesium (0.75%), iron, manganese, zinc, boron, and copper — the micronutrients that keep leaves green and stems strong enough to hold full blooms upright.
Made For
All hydrangea types — bigleaf, panicle, smooth, oakleaf, and mountain — in pots, beds, and borders. One bottle covers the whole flowering season.
Problems It Solves
- Few or small blooms on plants that haven't been fed
- Pale or yellowing leaves during the growing season
- Floppy stems that can't hold up full flower heads
- Slow spring growth on established shrubs
FAQs
How often should I feed my hydrangea?
Every 1–2 weeks in spring and summer while it's actively growing and blooming, then every 4 weeks in fall and winter.
Will this change my hydrangea's flower color?
No. Bigleaf hydrangea color is driven by soil pH and aluminum availability, not fertilizer. This feeds the plant for healthy, full blooms in whatever color your soil produces.
Will this burn my plants?
Not when used as directed. All of the nitrogen is nitrate nitrogen, which is gentler than ammonium-heavy fertilizers, so the burn risk is low at the labeled dilution.
Can I use it on potted and in-ground hydrangeas?
Yes. Use the same dilution for both — a watering can works for containers, and a hose-end sprayer covers larger plantings.
When will I see results?
Greener leaves and stronger new growth usually show within a few weeks of consistent feeding; bloom benefits build over the season.
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