GrowSabzHow to grow lavender in pots
Also called English Lavender, True Lavender, Common Lavender, lavandar · Lavandula angustifolia
لیونڈر
- ☀️ Sunlight
- 6–8hours daily
- 💧 Water
- 0.7 Levery 5 days, 10 L pot
- 🌡️ Ideal temp
- 18–28°C
- 🪴 Min pot
- 10 L25 cm deep
- 🧺 Harvest
- 60–90days from sowing
- ⚖️ Yield
- 0.2 kgper 20 L pot
Lavender keeps producing once it starts. First picking comes around day 60, and the plant then crops for roughly 60 more days — but only if you keep picking. Letting it run to flower is what ends the supply.
Short answer
Grow lavender in a 10 litre container at least 25 cm deep, watering about 500 ml per 10 litres of soil every 5 days, and keep temperatures between 18 and 28 °C. First harvest comes 60–90 days after sowing.
Where to plant it
What size pot does lavender need?
10 litres and 25 cm deep is the realistic minimum for a single plant. Pick a container below to see what changes.
| Container | Minimum size | Depth | Notes |
|---|---|---|---|
| Pot | 10 L | 25 cm | Ensure excellent drainage |
| Grow bag | 10 L | 25 cm | Fabric bags provide good aeration |
| Open ground | — | 30 cm | Prefers well-drained soil |
| Raised bed | 20 L | 30 cm | Excellent for drainage control |
Watering
How often should you water lavender?
Every 5 days through the growing season, at about 500 ml per 10 litres of soil — every 3 days in hot weather, every 7 days when it turns cool. Water in the early morning. Drip irrigation or base watering works best.
Too little water
- wilting
- greyer foliage
- stunted growth
Too much water
- yellowing leaves
- root rot
- stunted growth
- plant collapse
Avoid: overhead watering; standing water; soggy soil; frequent shallow watering.
Climate
Can you grow lavender where you live?
No hardiness zone needed — compare your actual temperatures against the plant's own limits.
| Ideal range | 18 – 28 °C |
|---|---|
| Survives | -15 – 35 °C |
| Germinates above | 18 °C — best at 21 °C, about 21 days |
| Flowers drop | above 32 °C, or below 5 °C |
| Sunlight | 6–14 hrs/day, best 8 |
| Frost | Low sensitivity |
The flower-drop thresholds matter more than the survival ones. A plant can be perfectly alive at 35 °C and still give you nothing.
How cold is too cold for lavender? Check your temperaturesEnter your night low and day high — see if it survives, and if it will cropTimeline
Lavender growing stages, day by day
Click any stage to see what's happening. Durations shift with temperature — a warm season runs roughly a quarter faster than a cool one.
Feeding
Fertiliser schedule for lavender
Feed on the interval below, changing what you give as the plant shifts from making leaves to making fruit.
| Stage | What to use | Per 10 L | Every |
|---|
How to prepare each feed
Common mistakes
Why lavender fails, and how to avoid it
- A container that is too small
Below 10 litres the root run is too shallow. The plant grows, flowers late, and drops whatever it sets because it cannot support the crop.
- Watering too lightly
A daily splash wets the top few centimetres and nothing else. Lavender wants about 500 ml per 10 litres of soil — one deep soak beats three shallow ones.
- Ignoring the flower-drop threshold
Above 32 °C, or below 5 °C, flowers fall before setting. The plant can look perfectly healthy and still give you nothing — shade it through the hottest hours.
- Planting it beside Mint
Mint is an aggressive spreader and prefers moist, rich soil, which is the opposite of what lavender needs. It will outcompete lavender.
Companions
What to plant with lavender
Good neighbours
Lavender's strong scent deters aphids and deer, protecting roses. Both enjoy similar growing conditions (full sun, good drainage).
Deters cabbage worms, slugs, and other pests that target brassicas.
Attracts beneficial pollinators like bees and butterflies, and shares similar drought-tolerant, full-sun requirements.
Both are Mediterranean herbs with similar needs for full sun, well-drained soil, and low water. Their combined scents can confuse pests.
Attracts a wide range of pollinators, increasing fruit set on nearby trees.
Keep apart from
Mint is an aggressive spreader and prefers moist, rich soil, which is the opposite of what lavender needs. It will outcompete lavender.
Hostas prefer shade and consistently moist, rich soil, which would lead to root rot and decline for lavender.
Impatiens require shade and very moist soil, conditions that are detrimental to lavender's health.
Rhododendrons thrive in acidic, moist soil, while lavender needs alkaline to neutral, well-drained soil. Their needs are incompatible.
Most ferns prefer shady, consistently moist, and often acidic conditions, which are the opposite of what lavender requires.
Problems
Lavender pests and diseases
Each lists the weather that brings it on, so you know when to start checking rather than reacting once it's established.
Root Rot humidity any · temp any
The most common issue for lavender, caused by overwatering or poorly draining soil. Leaves yellow, wilt, and the plant eventually dies. Ensure excellent drainage.
Septoria Leaf Spot humidity >70% · temp 18-25
Small, circular spots with dark borders and light centers appear on leaves. Can lead to defoliation in severe cases. Improve air circulation.
Powdery Mildew humidity 50-70% · temp 20-27
White, powdery patches on leaves and stems, especially in humid conditions with poor air circulation. Can weaken the plant.
Shab Phoma Lavandulae humidity >75% · temp 15-25
A serious fungal disease causing stems to blacken and die back, often starting from the base. Prune affected parts and ensure good air flow.
Aphids humidity any · temp 15-25
Small, soft-bodied insects that cluster on new growth, sucking sap. Lavender is generally resistant, but young plants can be affected.
Spittlebugs humidity any · temp 15-30
Small insects that create frothy, white 'spittle' on stems and leaves to protect themselves. Generally harmless but can be unsightly.
Lavender Gall Midge humidity any · temp any
Tiny flies whose larvae cause galls (swollen, distorted tissue) on flower buds, preventing them from opening. Prune and destroy affected buds.
Harvest
When to harvest lavender
First picking falls between day 60 and day 90, and the plant then keeps producing for about 60 days. Pick often — what you leave on the plant signals it to stop making more.
How to tell it's ready
- Flower buds are showing color, but only a few bottom flowers have opened.
- Strong fragrance when gently rubbed.
How much to expect
Storing it: Hang upside down in a cool, dark, well-ventilated area for drying. Store dried flowers in airtight containers.
Questions
Lavender: common questions
How long does lavender take to grow?
About 120 days from sowing to the first harvest, with picking usually starting between day 60 and day 90. It then keeps producing for roughly 60 more days. Warm weather pulls that forward; cool weather pushes it back.
What size pot does lavender need?
At least 10 litres and 25 cm deep for one plant. A raised bed wants 20 litres of soil and 30 cm of depth.
How often should I water lavender?
About 500 ml per 10 litres of soil, every 5 days in normal weather — every 3 days when it is hot and every 7 days when cool. Water in the early morning.
What temperature does lavender need?
It does best between 18 °C and 28 °C and survives from -15 °C to 35 °C. Seed needs soil above 18 °C to germinate, ideally around 21 °C.
Can I grow lavender in winter?
It tolerates cold better than most, down to about -15 °C, so a sheltered spot or a cold frame will often carry it through.
How do I know when lavender is ready to harvest?
Flower buds are showing color, but only a few bottom flowers have opened.; Strong fragrance when gently rubbed.. Once picked: hang upside down in a cool, dark, well-ventilated area for drying. store dried flowers in airtight containers.
How much does one lavender plant produce?
Roughly 0.2 kg from a 20 litre container, or about 0.5 kg in open ground. Larger containers give proportionally more, up to a point.