Best Fertilizer for Basil
Set your conditions — the recommendation updates instantly.
GardenSays
Work about 0.2 lb of balanced garden fertilizer (e.g., 10-10-10), at half the usual vegetable rate into your 32 sq ft bed before planting.
- Fertilizer
- 10-10-10
- Amount
- ≈ 0.2 lb
- Next feeding
- At first fruit
For a 32 sq ft bed, that's roughly 0.2 lb (3 oz) of fertilizer, spread evenly and worked into the top 6 inches a few days before planting. A soil test beats any rule of thumb — if you have one, follow it instead.
- More fertilizer means less flavor — basil oils concentrate under lean, sunny conditions.
- Pinching flower spikes does more for leaf production than any feeding.
Do this this week
- 1.Spread ≈ 0.2 lb of balanced fertilizer (e.g. 10-10-10) evenly over the 32 sq ft bed
- 2.Work it into the top 6 inches a few days before planting
- 3.Then hold — nothing more until only if leaves turn uniformly pale after repeated harvests
Typical estimate · 1 verified source · Checked 2026-07-15 · How we decide
Why
Then hold off: no more fertilizer until only if leaves turn uniformly pale after repeated harvests. Feeding again too early is the classic way to get a huge green plant with no fruit.
- One balanced pre-plant application plus a fruit-set sidedress matches how demand actually rises.
- A light feeder — overfeeding grows big bland leaves with less of the aromatic oils you grow it for.
When this doesn't apply
- Soil test results override this: high-P soils need nitrogen-only products.
- Beds heavily amended with compost each year may need only half this rate.
How this was calculated
- 1. Feeding profile
Basil: A light feeder — overfeeding grows big bland leaves with less of the aromatic oils you grow it for.
- 2. Pre-plant rate0.75 lb/100 sq ft (our estimate)GardenSays estimate
balanced garden fertilizer (e.g., 10-10-10), at half the usual vegetable rate: 0.75 lb per 100 sq ft (midpoint of published extension rates), worked into the top 6 inches
- 3. Your bed≈ 0.2 lb (3 oz)Calculated result
0.75 lb/100 sq ft × 32 sq ft
Data sources
- University of Minnesota Extension — Growing basil in home gardens — Basil needs only modest fertility; rich feeding reduces essential oil concentration. (checked 2026-07-15)
What changes this answer
Where is it growing?
Fertilizer type
Plant stage
Bed area (sq ft)
Set the value in the calculator above.
Every change updates the answer, the math, the weekly steps and the share link instantly.
People also ask
When should I fertilize basil?
Work about 0.2 lb of balanced garden fertilizer (e.g., 10-10-10), at half the usual vegetable rate into your 32 sq ft bed before planting. Calculate yours →
How often to water basil?
Basil plants grow well in containers — use at least a 2-gallon pot (a single plant: 2 gal) with drainage holes. Calculate yours →
Best fertilizer for tomatoes?
Work about 0.5 lb of balanced garden fertilizer (e.g., 10-10-10) into your 32 sq ft bed before planting. Calculate yours →
Your next decisions
More fertilizer tools: see all →