GrowSabzHow to grow lupine in pots
Also called Lupin, lupinus, lupins · Lupinus spp.
لوپین
- ☀️ Sunlight
- 6–8hours daily
- 💧 Water
- 0.9 Levery 3 days, 10 L pot
- 🌡️ Ideal temp
- 15–24°C
- 🪴 Min pot
- 10 L25 cm deep
- 🧺 Harvest
- 70–90days from sowing
- ⚖️ Yield
- 0.1 kgper 20 L pot
Lupine keeps producing once it starts. First picking comes around day 70, and the plant then crops for roughly 60 more days — but only if you keep picking. Blooms left on the plant is a signal to stop making more.
Short answer
Grow lupine in a 10 litre container at least 25 cm deep, watering about 700 ml per 10 litres of soil every 3 days, and keep temperatures between 15 and 24 °C. First harvest comes 70–90 days after sowing.
Where to plant it
What size pot does lupine 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 | Choose deep pots to accommodate taproot. Ensure good drainage. |
| Grow bag | 10 L | 25 cm | Fabric bags provide excellent aeration and drainage. |
| Open ground | — | 30 cm | Plant in well-drained soil. Space plants adequately for air circulation. |
| Raised bed | 20 L | 30 cm | Allows for excellent drainage and soil customization. |
Watering
How often should you water lupine?
Every 3 days through the growing season, at about 700 ml per 10 litres of soil — every 2 days in hot weather, every 5 days when it turns cool. Water in the early morning. Base watering works best.
Too little water
- wilting leaves
- stunted growth
- flower bud drop
Too much water
- yellowing leaves
- soft stems
- root rot
Avoid: waterlogging; overhead watering in humid conditions.
Climate
Can you grow lupine where you live?
No hardiness zone needed — compare your actual temperatures against the plant's own limits.
| Ideal range | 15 – 24 °C |
|---|---|
| Survives | -10 – 30 °C |
| Germinates above | 10 °C — best at 21 °C, about 21 days |
| Flowers drop | above 27 °C, or below 5 °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 30 °C and still give you nothing.
How cold is too cold for lupine? Check your temperaturesEnter your night low and day high — see if it survives, and if it will cropTimeline
Lupine 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 lupine
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 lupine 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. Lupine wants about 700 ml per 10 litres of soil — one deep soak beats three shallow ones.
- Ignoring the flower-drop threshold
Above 27 °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 Peas
As fellow legumes, peas and lupines compete for similar soil resources and can share common diseases, potentially leading to reduced vigor for both.
Companions
What to plant with lupine
Good neighbours
Lupines fix nitrogen in the soil, which can benefit nearby roses. Their tall flower spikes also provide a beautiful contrast.
Benefit from the nitrogen fixed by lupines, leading to healthier growth and potentially better fruit production.
Repel nematodes and other soil-borne pests that can affect lupines and other garden plants.
Attracts beneficial insects like hoverflies and ladybugs, which prey on aphids, a common lupine pest.
Their strong scent can deter aphids and other pests from infesting lupines.
Keep apart from
As fellow legumes, peas and lupines compete for similar soil resources and can share common diseases, potentially leading to reduced vigor for both.
Similar to peas, beans are legumes and can compete with lupines for space and nutrients, and may share susceptibility to certain pests and diseases.
Corn is a heavy feeder and can outcompete lupines for water and nutrients, especially if soil resources are limited.
While lupines fix nitrogen, excessive nitrogen from other sources or competition for other nutrients can sometimes hinder brassica growth or vice versa.
Lupines prefer slightly acidic to neutral soil (pH 6.0-7.0). Plants that thrive in highly alkaline conditions may not do well when planted near lupines, or vice versa.
Problems
Lupine 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, often green or black, cluster on new growth and undersides of leaves, sucking sap and causing distorted growth. Lupine aphids are particularly common.
Powdery Mildew humidity 50-70% · temp 20-27
White, powdery fungal spots appear mainly on the upper surface of leaves. Can lead to yellowing and premature leaf drop, especially in crowded or poorly ventilated conditions.
Lupine Anthracnose humidity >80% · temp 20-25
A serious fungal disease causing dark, sunken lesions on stems, leaves, and pods. Can lead to wilting, stem breakage, and seed discoloration. Spreads rapidly in wet conditions.
Rust humidity >70% · temp 18-24
Appears as small, orange-brown pustules (like rust) on the undersides of leaves and stems. Can cause premature defoliation and reduced plant vigor.
Slugs Snails humidity >80% · temp 10-20
These mollusks chew irregular holes in leaves, especially on young plants. Look for slime trails as evidence.
Root Rot humidity any · temp any
Caused by overwatering or poorly draining soil, leading to wilting, yellowing leaves, and eventually plant death as roots decay.
Mosaic Virus humidity any · temp any
Causes mottled, distorted, or stunted leaves with light and dark green patterns. Can be spread by aphids or contaminated tools. No cure, remove infected plants.
Downy Mildew humidity >85% · temp 10-20
Appears as purplish-brown spots on the undersides of leaves, with yellow patches on the upper surface. Can cause defoliation and reduced vigor, especially in cool, wet conditions.
Harvest
When to harvest lupine
First picking falls between day 70 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 spikes 1/2 to 2/3 open (for cut flowers)
- Seed pods dry and brittle (for seeds)
How much to expect
Storing it: Cut flowers in water, cool room. Seeds in a cool, dry, dark place.
Questions
Lupine: common questions
How long does lupine take to grow?
About 120 days from sowing to the first harvest, with picking usually starting between day 70 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 lupine 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 lupine?
About 700 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 lupine need?
It does best between 15 °C and 24 °C and survives from -10 °C to 30 °C. Seed needs soil above 10 °C to germinate, ideally around 21 °C.
Can I grow lupine in winter?
It tolerates cold better than most, down to about -10 °C, so a sheltered spot or a cold frame will often carry it through.
How do I know when lupine is ready to harvest?
Flower spikes 1/2 to 2/3 open (for cut flowers); Seed pods dry and brittle (for seeds). Once picked: cut flowers in water, cool room. seeds in a cool, dry, dark place.
How much does one lupine plant produce?
Roughly 0.1 kg from a 20 litre container, or about 0.25 kg in open ground. Larger containers give proportionally more, up to a point.