GrowSabzHow to grow tarragon in pots
Also called estragon, dragon herb, french tarragon · Artemisia dracunculus
ٹیرگن
- ☀️ Sunlight
- 6–8hours daily
- 💧 Water
- 0.3 Levery 3 days, 5 L pot
- 🌡️ Ideal temp
- 18–25°C
- 🪴 Min pot
- 5 L20 cm deep
- 🧺 Harvest
- 60–90days from sowing
- ⚖️ Yield
- 0.4 kgper 20 L pot
Tarragon keeps producing once it starts. First picking comes around day 60, and the plant then crops for roughly 180 more days — but only if you keep picking. Letting it run to flower is what ends the supply.
Short answer
Grow tarragon in a 5 litre container at least 20 cm deep, watering about 500 ml per 10 litres of soil every 3 days, and keep temperatures between 18 and 25 °C. First harvest comes 60–90 days after sowing.
Where to plant it
What size pot does tarragon need?
5 litres and 20 cm deep is the realistic minimum for a single plant. Pick a container below to see what changes.
| Container | Minimum size | Depth | Notes |
|---|---|---|---|
| Pot | 5 L | 20 cm | Ensure good drainage to prevent root rot. |
| Grow bag | 5 L | 20 cm | Excellent for drainage and air circulation. |
| Open ground | — | 25 cm | Prefers well-drained soil; avoid heavy clay. |
| Raised bed | 10 L | 25 cm | Well-drained soil is crucial for healthy growth. |
Watering
How often should you water tarragon?
Every 3 days through the growing season, at about 500 ml per 10 litres of soil — every 2 days in hot weather, every 5 days when it turns cool. Water in the early morning. Bottom watering or at soil level works best.
Too little water
- wilting leaves
- stunted growth
- yellowing leaves
Too much water
- yellowing leaves
- drooping
- root rot
- stunted growth
Avoid: overhead watering; soggy soil; standing water.
Climate
Can you grow tarragon where you live?
No hardiness zone needed — compare your actual temperatures against the plant's own limits.
| Ideal range | 18 – 25 °C |
|---|---|
| Survives | -5 – 35 °C |
| Germinates above | 18 °C — best at 21 °C, about 10 days |
| Flowers drop | above 30 °C, or below 10 °C |
| Sunlight | 6–10 hrs/day, best 8 |
| Frost | Medium 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 tarragon? Check your temperaturesEnter your night low and day high — see if it survives, and if it will cropTimeline
Tarragon 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 tarragon
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 tarragon fails, and how to avoid it
- A container that is too small
Below 5 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. Tarragon wants about 500 ml per 10 litres of soil — one deep soak beats three shallow ones.
- Ignoring the flower-drop threshold
Above 30 °C, or below 10 °C, flowers fall before setting. The plant can look perfectly healthy and still give you nothing — shade it through the hottest hours.
- Harvesting too late
Left too long the colour changes, seeds harden and the flavour sharpens. Pick on the signs listed below, not on the calendar.
- Planting it beside Cabbage
All members of the brassica family (cabbage, broccoli, kale) can stunt the growth of tarragon.
Companions
What to plant with tarragon
Good neighbours
Deters pests and enhances growth.
Deters pests and enhances growth.
Deters pests like hornworms and improves overall vigor.
Repels nematodes and other harmful insects.
General good neighbor, can deter aphids.
Keep apart from
Problems
Tarragon 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.
Aphids humidity any · temp 15-25
Small, soft-bodied insects that cluster on new growth and the undersides of leaves, sucking sap and secreting sticky honeydew. Can weaken young plants.
Spider Mites humidity <50% · temp >27
Tiny pests that cause leaves to look stippled, pale, and eventually turn yellow and drop. Fine webbing may be visible, especially in hot, dry conditions.
Powdery Mildew humidity 50-70% · temp 20-27
White, powdery fungal spots appear mainly on the upper surface of leaves. Occurs in humid conditions with poor air circulation. Can reduce plant vigor and flavor.
Root Rot humidity >80% · temp any
Caused by overwatering and poor drainage. Leaves yellow, wilt, and the plant eventually collapses. Roots become soft and brown.
Slugs Snails humidity >70% · temp 10-20
Chew irregular holes in leaves, especially on young plants. Leave silvery slime trails. Active in damp, cool conditions.
Yellowing Leaves humidity any · temp any
Leaves turn yellow, often due to overwatering, poor drainage, nutrient deficiency (especially iron or nitrogen), or compacted soil. Can also be a sign of root rot.
Harvest
When to harvest tarragon
First picking falls between day 60 and day 90, and the plant then keeps producing for about 180 days. Pick often — what you leave on the plant signals it to stop making more.
How to tell it's ready
- Lush, fragrant leaves, before flowering for best flavor. Plant is at least 6-8 inches tall.
How much to expect
Storing it: Fresh: wrapped in a damp paper towel in the fridge for up to 2 weeks. Dried: in an airtight container. Frozen: chopped in ice cube trays with water/oil.
Questions
Tarragon: common questions
How long does tarragon take to grow?
About 75 days from sowing to the first harvest, with picking usually starting between day 60 and day 90. It then keeps producing for roughly 180 more days. Warm weather pulls that forward; cool weather pushes it back.
What size pot does tarragon need?
At least 5 litres and 20 cm deep for one plant. A raised bed wants 10 litres of soil and 25 cm of depth.
How often should I water tarragon?
About 500 ml per 10 litres of soil, every 3 days in normal weather — every 2 days when it is hot and every 5 days when cool. Water in the early morning.
What temperature does tarragon need?
It does best between 18 °C and 25 °C and survives from -5 °C to 35 °C. Seed needs soil above 18 °C to germinate, ideally around 21 °C.
Can I grow tarragon in winter?
It tolerates cold better than most, down to about -5 °C, so a sheltered spot or a cold frame will often carry it through.
How do I know when tarragon is ready to harvest?
Lush, fragrant leaves, before flowering for best flavor. Plant is at least 6-8 inches tall.. Once picked: fresh: wrapped in a damp paper towel in the fridge for up to 2 weeks. dried: in an airtight container. frozen: chopped in ice cube trays with water/oil.
How much does one tarragon plant produce?
Roughly 0.4 kg from a 20 litre container, or about 1 kg in open ground. Larger containers give proportionally more, up to a point.