How to Grow Field Poppies: A Practical Guide from Seed to Flowers

Field poppies are one of those wildflowers that almost everyone recognises. Their bright red flowers are a familiar sight in traditional cornfield displays, and they're wonderfully easy to grow from seed.

They're annuals, so each plant grows, flowers and produces seed in a single season. Leave some of the seed heads in place, though, and you may find new seedlings appearing naturally in future years.

Field poppies are happiest in an open, sunny position and don't need rich soil or much attention. In fact, they're a good example of a plant that's often better when we don't fuss over it too much.

They're also useful for wildlife. Poppy flowers don't produce nectar, but they provide pollen for bees and other visiting insects. That's an important distinction and one of the reasons I like growing them alongside other wildflowers that provide nectar as well.

Sow them with cornflowers, corncockle and other traditional annual wildflowers and you'll soon have the beginnings of a lovely cornfield display.

When to Sow

Field poppies can be sown in spring or autumn.

For spring sowing, March to May is a good time. I prefer sowing them directly where they're going to flower rather than starting them in pots and transplanting them later.

Poppies develop a taproot and generally don't appreciate having their roots disturbed, so direct sowing makes life easier for both you and the plant.

You can also sow from August to October. Autumn-sown seedlings establish while conditions are still suitable and can produce an earlier display the following year.

If you have enough seed, try sowing some in autumn and another small batch in spring. It spreads the risk a little and can help extend the flowering period.

Don't worry if autumn seedlings stay fairly small through winter. They'll start growing again once conditions improve in spring.

How to Sow

Poppy seeds are tiny, so there's no need to bury them deeply.

Choose a sunny area and remove weeds before sowing. Rake the soil to create a reasonably fine surface.

Scatter the seeds thinly over the surface and lightly rake or press them into the soil. They only need a very light covering.

The hardest part is probably not sowing far too many. Those tiny seeds have a remarkable ability to leave the packet in one enthusiastic heap.

Mixing the seed with a little dry sand can make it easier to scatter more evenly over a larger area.

Water gently if the ground is dry. 

Keep the ground reasonably moist while the seeds germinate and establish.

Thinning and Growing On

Once the seedlings appear, thin them if they're very crowded.

You don't need to be too precise in a natural wildflower area, but around 15–20cm between stronger plants will give them room to develop.

I wouldn't worry about every seedling that's slightly too close to its neighbour. A wildflower patch isn't supposed to look like a row of vegetables.

Keep weeds under control while the poppies are small. This is probably the most useful thing you can do during the early stages because young seedlings don't want to be competing with established weeds.

Once they're growing strongly, poppies need very little attention.

Avoid transplanting established seedlings if possible. If a few have appeared somewhere inconvenient, it's usually easier to remove them and let the others carry on.

As the plants get taller, they'll often lean naturally amongst neighbouring wildflowers. In a mixed planting, I generally leave them to it.

Growing in Pots

You can grow field poppies in containers, although I think they look at their best when they're allowed to grow naturally in a larger group.

Choose a reasonably deep pot with good drainage and place it somewhere sunny.

Sow directly into the container rather than raising seedlings elsewhere and moving them later.

Scatter the seed thinly, press it gently into the compost and water carefully.

Once seedlings appear, thin them if necessary so the stronger plants have room to develop.

Container-grown poppies will need more regular watering than plants in the ground, particularly during warm weather.

There's no need to feed them heavily. Ordinary multipurpose compost will generally provide more than enough nutrients.

Watering and Feeding

Keep young poppies watered while they're establishing if conditions are dry.

Once established, plants growing in the ground are fairly tolerant and shouldn't need constant watering. During a prolonged dry spell, give them a proper drink rather than little amounts every day.

Poppies growing in containers need checking more regularly.

Feeding generally isn't necessary.

Field poppies naturally grow well in disturbed, relatively low-fertility soils. Adding lots of fertiliser can encourage lush leafy growth without giving you a better display of flowers.

If you're growing a cornfield wildflower mixture, avoiding unnecessary feeding also helps prevent vigorous plants and grasses from overwhelming the annual flowers.

With poppies, sunshine and open ground are much more useful than a bottle of plant feed.

Flowering and Wildlife

Field poppies usually flower from June into August, although sowing time and weather will affect exactly when the display begins.

Each individual flower doesn't last particularly long, but a group of plants opening flowers at different times can give you a lovely display.

The flowers provide pollen rather than nectar. Bees can often be seen collecting that pollen from the dark centres of the flowers.

This is why I'd grow poppies as part of a mixture rather than relying on them as the only flower for wildlife.

Combine them with nectar-producing flowers such as cornflowers and other suitable wildflowers and you'll provide visiting insects with a much broader choice.

You can remove faded flowers if you want to prolong flowering, but on a wildlife patch I'd leave plenty alone to produce their distinctive seed heads.

They're worth leaving just for the seed heads, to be honest.

Saving Seed and Self-Seeding

Once flowering finishes, those familiar rounded poppy seed heads begin to develop.

Leave them on the plants until they mature and dry.

When they're ready, the tiny seeds can escape through openings near the top of the capsule. If you shake a ripe seed head and hear the seeds rattling inside, you'll understand why poppies can spread themselves around without much help from us.

You can let the seeds fall naturally or collect some for sowing elsewhere.

Store collected seed somewhere cool and dry.

Don't expect self-seeded plants to appear in exactly the same place every year. Poppy seed can remain dormant in the soil and germinate when the ground is disturbed and conditions suit it.

That's part of their charm. Sometimes the best poppy display is the one you didn't actually plan.

Common Problems

Poor Germination

Poppy seed is tiny and shouldn't be deeply buried.

If germination is disappointing, check that the seed hasn't been covered with too much soil. Very dry conditions immediately after sowing can also cause problems.

Slugs and Snails

Young seedlings can be damaged by slugs and snails during damp weather.

Keep an eye on them while they're small. Once established, poppies generally need very little protection.

Seedlings Growing Too Thickly

It's very easy to sow poppies too densely.

Thin the seedlings while they're young, leaving the stronger plants enough room to develop. Don't worry about achieving perfect spacing in a wildflower area.

Plants Becoming Tall and Floppy

Poppies can lean or fall over in exposed positions, particularly if they're growing in rich soil.

In a mixed wildflower patch, neighbouring plants often provide enough natural support. Avoid unnecessary feeding, which can encourage softer growth.

Few Flowers

Too much shade or very rich soil can result in plenty of growth without the display you were expecting.

Give field poppies an open, sunny position and don't overfeed them.

Plants Disappearing After Flowering

That's completely normal.

Field poppies are annuals, so the plants die after flowering and producing seed. Leave some seed heads to mature and you may have another generation waiting in the soil for the right conditions.

Field poppies are difficult to beat if you want that traditional wildflower look. Scatter the seed onto open soil, give it some sunshine and don't interfere too much. And once the flowers have finished, resist the urge to tidy everything away immediately — those rattling seed heads are already working on next year's display.