GrowSabzHow to grow potato in pots
Also called aloo, batatis, patate, kartoffel · Solanum tuberosum
آلو
- ☀️ Sunlight
- 6–8hours daily
- 💧 Water
- 2.4 Levery 3 days, 20 L pot
- 🌡️ Ideal temp
- 15–24°C
- 🪴 Min pot
- 20 L30 cm deep
- 🧺 Harvest
- 90–120days from sowing
- ⚖️ Yield
- 3 kgper 20 L pot
Potato drinks far more than most container plants — about 1000 ml for every 10 litres of soil, and in hot weather it wants that every single day. Underestimate that and you get the classic result: a plant that looks healthy in the morning and wilts by afternoon.
Short answer
Grow potato in a 20 litre container at least 30 cm deep, watering about 1000 ml per 10 litres of soil every 3 days, and keep temperatures between 15 and 24 °C. First harvest comes 90–120 days after sowing.
Where to plant it
What size pot does potato need?
20 litres and 30 cm deep is the realistic minimum for a single plant. Pick a container below to see what changes.
| Container | Minimum size | Depth | Notes |
|---|---|---|---|
| Pot | 20 L | 30 cm | Ensure good drainage and space for hilling. |
| Grow bag | 25 L | 35 cm | Excellent for hilling and harvesting. Fabric bags promote air pruning. |
| Open ground | — | 30 cm | Plant in well-drained soil, hill regularly. |
| Raised bed | 40 L | 35 cm | Provides excellent drainage and allows for deep hilling. |
Watering
How often should you water potato?
Every 3 days through the growing season, at about 1000 ml per 10 litres of soil — daily in hot weather, every 4 days when it turns cool. Water in the early morning. Drip irrigation or base watering works best.
Too little water
- wilting leaves
- stunted growth
- small tubers
Too much water
- yellowing lower leaves
- soft stems
- tuber rot
- fungus smell
Avoid: overhead watering (can promote blight); standing water; extreme fluctuations in moisture.
Climate
Can you grow potato where you live?
No hardiness zone needed — compare your actual temperatures against the plant's own limits.
| Ideal range | 15 – 24 °C |
|---|---|
| Survives | 0 – 30 °C |
| Germinates above | 7 °C — best at 18 °C, about 10 days |
| Flowers drop | above 28 °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 30 °C and still give you nothing.
How cold is too cold for potato? Check your temperaturesEnter your night low and day high — see if it survives, and if it will cropTimeline
Potato 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 potato
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 potato fails, and how to avoid it
- A container that is too small
Below 20 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. Potato wants about 1000 ml per 10 litres of soil — one deep soak beats three shallow ones.
- Ignoring the flower-drop threshold
Above 28 °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 Tomato
Shares the same blight diseases (early and late blight) and insects (like Colorado potato beetle), increasing risk for both.
- Leaving it out through a cold snap
Potato is highly frost-sensitive. One night below 0 °C can end the plant outright — bring containers in or cover them.
Companions
What to plant with potato
Good neighbours
Fix nitrogen in the soil, which benefits potatoes, and can deter Colorado potato beetles.
Roots produce a chemical that kills root-knot nematodes, and flowers repel other harmful insects.
Known to deter Colorado potato beetles and other potato pests.
Improves potato growth and health, potentially reducing disease incidence.
Acts as a ground cover, suppressing weeds, and is believed to repel potato beetles.
Keep apart from
Shares the same blight diseases (early and late blight) and insects (like Colorado potato beetle), increasing risk for both.
Can spread Verticillium wilt, a fungal disease that affects potatoes.
Inhibits potato growth due to allelopathic chemicals released from its roots.
Can attract blight and compete for nutrients, potentially weakening potato plants.
Produces substances from its roots that inhibit the growth of many vegetables, including potatoes.
Problems
Potato 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.
Early Blight humidity >80% · temp 15-25
Starts as small, dark spots with concentric rings on older leaves. Can lead to significant defoliation and reduced tuber yield.
Late Blight humidity >80% · temp 10-20
Causes rapidly spreading, large, dark water-soaked spots on leaves and stems, and firm, reddish-brown decay on tubers. Devastating in cool, wet weather.
Colorado Potato Beetle humidity any · temp 18-30
Adult beetles and their red larvae chew holes in leaves, often defoliating plants entirely. Can severely reduce yields.
Potato Scab humidity any · temp 20-27
Causes rough, corky lesions or raised spots on the surface of tubers, reducing marketability. Favors alkaline soils.
Potato Leafhopper humidity any · temp >20
Small, wedge-shaped insects that suck sap from leaves, causing 'hopperburn' (yellowing, curling, and browning of leaf margins).
Aphids humidity any · temp 15-25
Small, soft-bodied insects that cluster on new growth and undersides of leaves, sucking sap and secreting sticky honeydew. Can transmit viruses.
Potato Virus Y humidity any · temp any
Causes mosaic patterns, leaf distortion, stunted growth, and significant yield reduction. Spread by aphids.
Rhizoctonia humidity any · temp 10-20
Causes black scurf (dark sclerotia) on tubers, stem cankers, and damping-off of sprouts. Favors cool, wet soil.
Wireworms humidity any · temp any
Larvae bore into tubers, creating tunnels and holes, making them unmarketable. Often found in grassy areas or after sod.
Flea Beetles humidity any · temp >18
Small, jumping beetles that chew numerous small holes ('shot-holes') in leaves. Severe infestations can stunt growth and reduce yields.
Verticillium Wilt humidity any · temp 20-28
Causes yellowing and wilting of lower leaves, often on one side of the plant, leading to premature death. Soil-borne fungal disease.
Harvest
When to harvest potato
First picking falls between day 90 and day 120.
How to tell it's ready
- Foliage dies back and turns yellow/brown
- Skin is firm and doesn't rub off easily (after 2-3 weeks of foliage dieback)
How much to expect
Storing it: Cool, dark, dry place (e.g., root cellar, basement) after curing.
Questions
Potato: common questions
How long does potato take to grow?
About 100 days from sowing to the first harvest, with picking usually starting between day 90 and day 120. Warm weather pulls that forward; cool weather pushes it back.
What size pot does potato need?
At least 20 litres and 30 cm deep for one plant. A raised bed wants 40 litres of soil and 35 cm of depth.
How often should I water potato?
About 1000 ml per 10 litres of soil, every 3 days in normal weather — daily when it is hot and every 4 days when cool. Water in the early morning.
What temperature does potato need?
It does best between 15 °C and 24 °C and survives from 0 °C to 30 °C. Seed needs soil above 7 °C to germinate, ideally around 18 °C.
Can I grow potato 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 potato is ready to harvest?
Foliage dies back and turns yellow/brown; Skin is firm and doesn't rub off easily (after 2-3 weeks of foliage dieback). Once picked: cool, dark, dry place (e.g., root cellar, basement) after curing.
How much does one potato plant produce?
Roughly 3 kg from a 20 litre container, or about 8 kg in open ground. Larger containers give proportionally more, up to a point.