Lemon Tree Fertilizer
Lemon tree food with a fruit-focused 3.6-3-5.1 NPK, kelp, and a full micronutrient package — made to carry potted and in-ground citrus through flowering, fruit set, and steady new growth. Higher potassium supports fruiting, while calcium, magnesium, and iron keep leaves deep green instead of the pale, veined yellowing citrus shows when it runs short.
How to Use Lemon Tree 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 fast-draining soil with some sand and perlite, water heavily, and let it dry out mostly between waterings.
What's Inside
The 3.6-3-5.1 ratio (3.6% nitrogen, 3% phosphate, 5.1% potash) is potassium-forward — built for the flowering and fruiting a lemon tree does heavily. All of the nitrogen is nitrate nitrogen, the form roots take up 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. Citrus draws these down hard — magnesium and iron shortage are the usual causes of yellowing leaves with green veins.
Made For
Potted and in-ground lemon trees — Meyer, Eureka, Lisbon, and other citrus — indoors under bright light or outdoors in warm climates. One bottle covers the whole growing season.
Problems It Solves
- Yellowing leaves with green veins — the classic citrus magnesium or iron shortage
- Flowers that drop without setting fruit
- Small or sour fruit on underfed trees
- Slow new growth on potted lemons that have been in the same soil for years
FAQs
How often should I feed my lemon tree?
Every 1–2 weeks in spring and summer while the tree is actively growing and fruiting, then every 4 weeks in fall and winter.
Why are my lemon tree's leaves turning yellow?
Yellowing between green veins usually means magnesium or iron shortage, which citrus burns through quickly. Both are included here, along with the rest of the micronutrient package.
Will this burn my tree?
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 indoor potted lemons and outdoor trees?
Yes. Use the same dilution for both — a watering can works for containers, and a hose-end sprayer covers larger in-ground trees.
When will I see results?
Greener leaves and stronger new growth usually show within a few weeks of consistent feeding; flowering and fruiting benefits build over the season.