Oak Tree Fertilizer
Support deep roots, strong branching, and a full healthy canopy with a liquid fertilizer made for oak trees. It provides consistent nutrition for healthy growth while keeping plant care straightforward.
Easy to mix into your normal watering routine, it makes regular feeding simple without adding a complicated extra step.
Why You'll Love It
- Strong Canopy Supports a full canopy and strong branching on mature oaks.
- Steady Growth For slow establishment on young or newly planted oaks.
- Strong Roots Potassium-forward feeding aimed at the deep root system an oak builds.
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.
Liquid oak tree fertilizer with a 3.6-3-5.1 NPK plus kelp. This tree food supports deep roots, strong branching, and a full healthy canopy.
How to Use Oak 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 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 |
Mix into your normal watering — no separate feeding routine needed.
What's Inside
The 3.6-3-5.1 ratio is built for a long-lived shade tree. Nitrogen at 3.6% fuels the spring flush and full canopy oaks are grown for, and potassium at 5.1% — the highest of the three — drives root development and the wood strength that lets an oak stand for generations. All of the nitrogen is nitrate nitrogen, the form roots absorb directly, so response is fast and burn risk stays low, which matters most for young trees still building their root systems.
Beyond NPK: sea kelp (Ascophyllum nodosum) for natural growth compounds, plus calcium at 2.1% — unusually high, and what strengthens new growth and roots — magnesium (0.75%), iron, manganese, zinc, boron, and copper. Iron and manganese matter for oaks in particular: a shortfall shows as pale, yellowing leaves with green veins, a common condition called chlorosis in oaks grown in alkaline soil.
Made For
Every oak (Quercus): fast-growing types like red, pin, and willow oak, slower and long-lived white and live oaks, and ornamental and container-grown young oaks — newly planted saplings through established landscape and shade trees.
Problems It Solves
- Pale, yellowing leaves with green veins (chlorosis)
- Thin canopy and weak spring growth
- Slow establishment on young or newly planted oaks
- Stressed trees recovering from transplant or drought
FAQs
How often should I feed my oak tree?
Every 1–2 weeks during spring and summer while it's actively growing, and every 4 weeks in fall and winter. Diluting into your regular watering (2 Tbs per gallon) keeps nutrition steady — this is most valuable for young oaks establishing their roots, which grow and fill out faster with consistent feeding.
My oak's leaves are yellow with green veins — what's wrong?
That's chlorosis, usually from iron or manganese being unavailable in alkaline soil rather than absent from it. Both nutrients are in the formula, and steady feeding helps green up new growth. If your soil is very alkaline, the condition can recur, so persistent cases may also need the soil pH lowered for a lasting fix.
Do established oaks need fertilizing?
Large, healthy oaks in good soil often don't need much — they're adapted to draw nutrients from a wide root zone. Feeding is most worthwhile for young trees establishing, oaks showing stress or poor color, and trees in poor or compacted soil. A thriving mature oak in rich ground may need little or none.
Will this burn my tree?
No — at the directed dilution, the formula is designed for regular use. All-nitrate nitrogen and low salt concentration make burn very unlikely, even on young saplings. For newly planted or transplanted oaks still establishing, start at half strength for the first two feedings.
When will I see results?
New growth greens up within the first few weeks of feeding during the growing season. Oaks grow slowly and steadily, so the goal is long-term vigor rather than a quick spurt — color and canopy fullness improve first, with real growth measured over seasons and years.
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