Strawberries from seed are a gardener's slow-burn project: the plants are cheap to raise in quantity, seed-grown varieties (especially alpine types) fruit in their first year, and there is a quiet satisfaction in eating a berry you grew from a speck of seed. It is not the fastest route to fruit — bare-root plants are — but it is the most rewarding.
Strawberry seed is tiny, needs light to germinate, and takes 14–21 days to sprout, so indoor sowing is the practical route. This guide covers the surface sowing, the patience the seed demands, and the honest comparison with bare-root plants — plus how to get seed-grown plants into the ground and fruiting. Strawberries can be started indoors or direct-sown — its sowing method is listed as "both" — and indoor sowing is the better choice if you want an earlier start, more even germination, or plants ready for the first warm weeks of the season. This crop is in the Rosaceae family, needs full sun, and takes 90–180 days to reach maturity, so the timing below is built around those facts, not guesswork.
Strawberries at a glance
| Growing factor | What strawberries need |
|---|---|
| Days to germination | 14–21 |
| Sowing method | both |
| Days to maturity | 90–180 |
| Soil pH | 5.5–6.5 |
| Spacing | 12–18 inches |
| Sun | full sun |
| Cold tolerance | hardy |
When to start strawberries seeds indoors
In Zones 3–5, start indoors 10–12 weeks before your last frost so plants are big enough to fruit in their first summer. In Zones 6–8, 8–10 weeks is enough. In Zones 9–10, start in late winter and plant out in early spring. In frost-free Zones 11–13, sow in the cooler months. Check your local extension service for frost dates, or use our frost-date calculator and seed-starting calculator.
As a rule, work backwards from your last frost: sow indoors 10–12 weeks before it if you are starting indoors at all, and check the seed packet against the germination time of 14–21 days. Our seed-starting calculator does the backwards maths for you, and the germination-time calculator helps you plan around that 14–21-day window. If you are unsure of your zone, the hardiness-zone finder will confirm it.
What you need
a seed tray or small pots, fine seed-starting mix, a clear lid or cling film, a spray bottle, a grow light or the brightest windowsill you have, labels, and small pots for potting on. Strawberry seedlings stay small for a long time, so small cells are fine at first.
You will also want a spray bottle or a watering can with a fine rose, and a notebook to record the sowing date — germination takes 14–21 days, and it is easy to forget when you sowed.
Step by step: starting strawberries seeds indoors
- Fill your containers. Fill trays or pots with fresh, damp seed-starting mix — not garden soil, which is too heavy and can carry disease. Press it down lightly and level the surface.
- Sow the seed. Scatter strawberry seed thinly on the surface of damp, fine seed-starting mix and press it in gently — do not cover it, as it needs light to germinate. Mist the surface, cover with a clear lid, and keep the tray warm and bright. Germination takes 14–21 days and is often uneven, so be patient and do not discard the tray early. A short chill in the fridge for a few weeks before sowing can improve germination on some varieties.
- Cover and label. Cover the tray with a clear lid or cling film to hold humidity, and label it with the crop and the date. Put it somewhere warm and bright, out of direct sun until seeds sprout.
- Wait for germination. Germination takes 14–21 days. Check the tray daily, mist the surface if it dries, and be patient — uneven germination is normal, especially for slow crops. Our germination-time calculator helps you track the window.
- Remove the cover. As soon as seedlings emerge, take the lid off. Good airflow from this point on is what prevents damping off.
- Give them light. Move the tray under a grow light or to your brightest window immediately — seedlings stretch within a day or two if the light is weak.
- Thin and pot on. Thin to one seedling per cell once they have two true leaves, snipping the extras rather than pulling them. Pot on into larger pots when roots show at the drainage holes, keeping the seedlings at the same depth.
- Feed lightly. Once seedlings have two sets of true leaves, feed with a half-strength liquid feed every week or two. Do not overfeed — soft, overfed seedlings are more likely to damp off and less likely to harden well.
Light for seedlings
Strawberry seedlings need 14–16 hours of bright light a day from the moment they emerge. Without it they stretch and go pale. Keep a grow light 2–4 inches above the leaves and raise it as they grow. A windowsill alone rarely gives enough light in early spring.
Watering seedlings
Strawberries have moderate water needs. Keep the mix evenly moist while seeds germinate — a mister is better than a watering can for tiny seeds — then water from below and let the surface dry slightly between waterings. Soggy mix causes damping off, the main killer of strawberry seedlings. Our watering calculator can help you work out how much water your seedlings need as they grow.
Hardening off
Harden seedlings off over 10 days: a few hours in sheltered shade at first, building to full sun and breeze. Strawberries are hardy, but young plants raised indoors are soft, so do not rush them. By the end of the week they should spend full days outside.
Transplanting outdoors
Plant out after the last frost, once seedlings have several sets of true leaves. Strawberries need full sun and soil pH 5.5–6.5. Space plants 12–18 inches apart, with the crown — the growing point — exactly at soil level, never buried and never exposed. Our plant-spacing calculator works out the layout. Water in well and mulch around (not over) the crowns. For the full picture — soil, feeding, pests and harvest — see our complete growing strawberries guide.
Common problems and fixes
| Problem | Fix |
|---|---|
| Seeds do not germinate | Seed buried under mix will not sprout — it needs light. Sow on the surface, keep the tray warm and damp, and allow the full 14–21 days. |
| Damping off | Seedlings collapse at the base. The mix was too wet or the lid stayed on too long. Remove the cover once seeds sprout and water from below. |
| Leggy seedlings | Not enough light. Move the grow light closer and give 14–16 hours a day. |
| Slugs eat young plants | Slugs love young strawberries. Use collars or traps, keep the bed tidy, and avoid watering late in the day. |
Seeds do not germinate
Seed buried under mix will not sprout — it needs light. Sow on the surface, keep the tray warm and damp, and allow the full 14–21 days.
Damping off
Seedlings collapse at the base. The mix was too wet or the lid stayed on too long. Remove the cover once seeds sprout and water from below.
Leggy seedlings
Not enough light. Move the grow light closer and give 14–16 hours a day.
Good companions for strawberries include borage, lettuce, onions, sage, thyme. Watch out for slugs, aphids, spider mites — check young plants regularly, and deal with pests early while plants are small. Our pest-identifier helper can help you work out what you are looking at.
Frequently asked questions
How long do strawberry seeds take to germinate?
14–21 days in warm, bright conditions. Germination is uneven, so keep the tray going for a full month.
Do strawberry seeds need light to germinate?
Yes — sow them on the surface and do not cover them with mix.
Is it better to grow strawberries from seed or bare-root plants?
Bare-root plants fruit faster and more reliably. Seed is cheaper and best for alpine varieties — grow both if you want fruit this year and a project for next.
How far apart should strawberry plants be?
12–18 inches apart in full sun, with soil pH 5.5–6.5 and the crown at soil level.
When will seed-grown strawberries fruit?
About 90–180 days from sowing for alpine and everbearing types; June-bearing varieties usually fruit the following year.