GrowSabzHow to grow stevia in pots
Also called Sugarleaf, Sweetleaf, Honey Leaf, sugarleaf · Stevia rebaudiana
سٹیویا
- ☀️ Sunlight
- 6–8hours daily
- 💧 Water
- 0.8 Levery 2 days, 10 L pot
- 🌡️ Ideal temp
- 20–30°C
- 🪴 Min pot
- 10 L20 cm deep
- 🧺 Harvest
- 90–120days from sowing
- ⚖️ Yield
- 0.1 kgper 20 L pot
Stevia is a heat-lover with no tolerance for cold. It wants 20–30 °C and frost kills it outright. Everything about growing it well comes down to timing — getting it into the season early enough to crop before temperatures fall away.
Short answer
Grow stevia in a 10 litre container at least 20 cm deep, watering about 700 ml per 10 litres of soil every 2 days, and keep temperatures between 20 and 30 °C. First harvest comes 90–120 days after sowing.
Where to plant it
What size pot does stevia need?
10 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 | 10 L | 20 cm | Use pots with good drainage |
| Grow bag | 10 L | 20 cm | Fabric breathes well, preventing root rot |
| Open ground | — | 25 cm | Ensure well-draining soil and good spacing |
| Raised bed | 20 L | 25 cm | Excellent for drainage control and soil quality |
Watering
How often should you water stevia?
Every 2 days through the growing season, at about 700 ml per 10 litres of soil — daily in hot weather, every 4 days when it turns cool. Water in the early morning. Bottom watering or drip irrigation works best.
Too little water
- wilting leaves
- stunted growth
- leaf drop
Too much water
- yellowing leaves
- soft stem
- root rot
Avoid: water on leaves; standing water; letting soil dry out completely.
Climate
Can you grow stevia where you live?
No hardiness zone needed — compare your actual temperatures against the plant's own limits.
| Ideal range | 20 – 30 °C |
|---|---|
| Survives | 5 – 35 °C |
| Germinates above | 18 °C — best at 24 °C, about 10 days |
| Flowers drop | above 32 °C, or below 10 °C |
| Sunlight | 6–10 hrs/day, best 8 |
| Frost | Highly sensitive — will not survive it |
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 stevia? Check your temperaturesEnter your night low and day high — see if it survives, and if it will cropTimeline
Stevia 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 stevia
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 stevia 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. Stevia wants about 700 ml per 10 litres of soil — one deep soak beats three shallow ones.
- Wetting the leaves
Overhead watering in the evening leaves foliage damp overnight, which is exactly the condition fungal disease needs. Water the soil, early in the day.
- Ignoring the flower-drop threshold
Above 32 °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 Fennel
Known to release substances that inhibit the growth of many nearby plants, including stevia.
- Leaving it out through a cold snap
Stevia is highly frost-sensitive. One night below 5 °C can end the plant outright — bring containers in or cover them.
Companions
What to plant with stevia
Good neighbours
Repels nematodes and other soil-borne pests, promoting healthier root systems for stevia.
Deters common garden pests like aphids and whiteflies, and may improve overall plant vigor.
Acts as a groundcover, suppressing weeds, and its strong scent can deter some pests.
Emits a strong odor that deters various pests, including aphids and spider mites, from nearby plants.
Keep apart from
Known to release substances that inhibit the growth of many nearby plants, including stevia.
Highly invasive and will aggressively compete with stevia for water and nutrients, often outcompeting it.
Tall and casts significant shade, which stevia, a sun-loving plant, does not prefer. Also a heavy feeder.
Problems
Stevia 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
Caused by overwatering and poor drainage. Leaves may yellow, wilt, and the plant eventually collapses. Ensure well-draining soil.
Powdery Mildew humidity >70% · temp 18-26
White, powdery spots on leaves and stems, particularly in humid conditions with poor air circulation. Can stunt growth.
Aphids humidity any · temp 15-25
Small, soft-bodied insects that cluster on new growth and undersides of leaves, sucking sap and causing distorted growth.
Whiteflies humidity >60% · temp >25
Tiny, white, winged insects that fly up when disturbed. They feed on sap, weakening the plant and potentially spreading viruses.
Spider Mites humidity <50% · temp >27
Tiny pests that cause stippling (tiny dots) on leaves, yellowing, and fine webbing on the undersides. Thrive in hot, dry conditions.
Leaf Spot humidity >75% · temp 20-30
Various fungal or bacterial diseases causing dark, sunken spots on leaves. Can lead to defoliation if severe.
Harvest
When to harvest stevia
First picking falls between day 90 and day 120, 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
- Leaves are mature and vibrant green
- Taste test for sweetness (best before flowering)
How much to expect
Storing it: Fresh leaves can be stored in the refrigerator for a few days. Dried leaves should be stored in an airtight container in a cool, dark place.
Questions
Stevia: common questions
How long does stevia take to grow?
About 100 days from sowing to the first harvest, with picking usually starting between day 90 and day 120. It then keeps producing for roughly 180 more days. Warm weather pulls that forward; cool weather pushes it back.
What size pot does stevia need?
At least 10 litres and 20 cm deep for one plant. A raised bed wants 20 litres of soil and 25 cm of depth.
How often should I water stevia?
About 700 ml per 10 litres of soil, every 2 days in normal weather — daily when it is hot and every 4 days when cool. Water in the early morning.
What temperature does stevia need?
It does best between 20 °C and 30 °C and survives from 5 °C to 35 °C. Seed needs soil above 18 °C to germinate, ideally around 24 °C.
Can I grow stevia in winter?
Not outdoors anywhere that frosts — it is highly frost-sensitive and will not survive it. In a frost-free winter it grows slowly; anywhere colder, treat it as a warm-season crop.
How do I know when stevia is ready to harvest?
Leaves are mature and vibrant green; Taste test for sweetness (best before flowering). Once picked: fresh leaves can be stored in the refrigerator for a few days. dried leaves should be stored in an airtight container in a cool, dark place.
How much does one stevia plant produce?
Roughly 0.1 kg from a 20 litre container, or about 0.2 kg in open ground. Larger containers give proportionally more, up to a point.