Geranium Fertilizer
Geranium fertilizer that promotes lush foliage and colorful seasonal blooms. Regular feeding keeps window boxes and beds producing fresh clusters instead of a few tired heads.
The liquid formula fits into regular watering, making consistent feeding easy for everyday plant care.
Why You'll Love It
- Healthy Foliage Supports lush leaves on geraniums in window boxes and beds.
- Bloom Support Regular feeding keeps fresh flower heads coming all season.
- Easy to Use Simple enough to use every time you water the boxes.
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.
Geranium fertilizer that promotes lush foliage and colorful seasonal blooms. Regular feeding keeps window boxes and beds producing fresh clusters instead of a few tired heads.
How to Use Geranium Fertilizer
| Method | Amount | How Often |
|---|---|---|
| Watering can — small plants (under 6") | 1 Tbs (15mL) per gallon of water | Feed once weekly through the growing season |
| Watering can — large plants (over 6") | 2 Tbs (30mL) per gallon of water | Feed once weekly through the growing season |
| Hose end sprayer | Set dial to the above feed rates | Feed once weekly through the growing season |
| Leaf misting (optional) | 1 tsp per quart (32 oz) of water | Spray on leaves every 1-2 weeks |
Mix into your normal watering — no separate feeding routine needed. Dose by plant size: 1 Tbs per gallon under 6", 2 Tbs over. Geraniums prefer soil that dries between waterings, so feed as part of a proper watering rather than adding extra.
What's Inside
A 3-3.6-5.1 ratio for a plant that blooms hardest when it isn't over-fed nitrogen. Potassium leads at 5.1%, managing the water pressure that keeps geranium florets firm through summer heat and moving sugars into the flower heads that give them their color depth. Phosphate at 3.6% feeds bud formation, the step that sets how many flower clusters you get. Nitrogen holds at 3%, all of it nitrate nitrogen — absorbed directly by roots, fast-acting with low burn risk — enough for healthy foliage, restrained enough that plants keep setting buds instead of running to leaf and stem.
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. Magnesium and iron are the two container geraniums run short of first — daily summer watering flushes both out of potting mix, and the shortage shows as yellowing between the veins on lower leaves while the plant keeps trying to bloom on top.
Made For
Zonal geraniums (Pelargonium x hortorum), ivy geraniums, Martha Washington and regal types, and scented geraniums — in patio containers, window boxes, hanging baskets, and bedding plantings — plus geraniums overwintered indoors.
Problems It Solves
- Yellowing lower leaves on container geraniums
- Tall, leggy plants with sparse flowers
- Blooming that tapers off by midsummer
- Washed-out flower color instead of deep saturation
FAQs
How often should I feed geraniums?
Feed once weekly through the growing season, dosing by size: 1 Tbs (15mL) per gallon of water for plants under 6", 2 Tbs (30mL) per gallon for larger ones. A hose end sprayer set to those rates covers beds and window boxes fast. Container geraniums need the weekly rhythm most — frequent summer watering flushes nutrients out of pots quickly.
Why is my geranium tall and leggy with few flowers?
Mostly a pruning issue, not a feeding one. Geraniums bloom on new growth, and unpinched plants stretch into bare-stemmed stalks with flowers only at the tips. Pinch growing tips through the season and cut leggy stems back hard — they respond well. Deadhead spent flower clusters down to the stem too. Excess nitrogen makes the stretching worse, which is why this formula keeps N at 3%.
Why are my geranium's lower leaves turning yellow?
Check watering first: geraniums hate sitting wet, and soggy soil yellows lower leaves fast — let pots dry between waterings and make sure drainage is clear. If watering is right, depleted potting mix is the likely cause, and yellowing between the veins on older leaves points specifically to magnesium. This formula supplies magnesium and iron alongside the bloom nutrition.
Is this for garden geraniums or hardy geraniums?
Both benefit, but they're different plants. What most people call geraniums — the classic red, pink, and white bedding and container plants — are pelargoniums, which this formula targets. True hardy geraniums (cranesbill) are perennials with a similar appetite, and the same bloom-weighted ratio suits them. Either way, follow the size-based label rates.
Should I feed geraniums I'm overwintering indoors?
Lightly, if at all. Overwintered geraniums are being held rather than grown — most people cut them back and keep them cool and dry in reduced light, where feeding pushes weak growth the light can't support. The label's schedule runs through the growing season for that reason. Resume weekly feeding when you bring them back into light in late winter and new growth starts.
When will I see results?
All the nitrogen is nitrate, absorbed directly by roots, so it starts working with the first watering. Expect deeper leaf color within 1-2 weeks, and yellowing lower leaves stabilizing as new growth comes in. Flower response follows in 3-4 weeks — more clusters and better color — since the plant has to initiate those buds first. Pair it with pinching for the fastest visible change.
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