How to grow celery from seed
Celery is a slow-growing crop that requires patience, steady moisture, and consistent care. Starting from seed gives you the best results, allowing plants to develop fully before the growing season.
With the right conditions, you can produce crisp, flavourful stems at home.
Quick answer: how to grow celery from seed
To grow celery from seed, sow seeds on the surface of moist compost, keep them warm (around 18–21°C), and place in a bright location. Keep soil consistently moist, transplant seedlings as they grow, and maintain steady watering throughout the season.
Step-by-step guide to growing celery from seed
Step 1: Choose containers and compost
- Use seed trays or small pots with drainage
- Fill with fine seed compost
- Lightly firm the surface
Step 2: Sow the seeds
- Scatter seeds thinly on the surface
- Do not bury deeply — seeds need light to germinate
- Lightly press into the compost
Step 3: Provide warmth
- Keep at 18–21°C for germination
- Use a propagator or warm indoor space
- Germination can be slow
Step 4: Water and provide light
- Mist or water gently
- Keep compost consistently moist
- Place in a bright position once seedlings appear
Step 5: Transplant and grow on
- Prick out seedlings once large enough to handle
- Pot on into larger containers
- Harden off before planting outdoors
When to sow celery seeds
Celery should be started:
- In early to mid-spring indoors
- Early sowing is important due to slow growth
- Requires a long growing season
Seeds can take 2–3 weeks (or longer) to germinate.
Best celery varieties
- Tall Utah
- Reliable and widely grown
- Good flavour and structure
- Pascal
- Tender stems
- Vigorous growth
- Self-blanching varieties
- Easier to grow
- Less need for earthing up
Choose based on ease of growing and desired flavour.
Ideal growing conditions
- Temperature
- Moderate warmth (18–21°C early on)
- Light
- Bright light after germination
- Soil
- Rich, moisture-retentive soil
- Water
- Consistent moisture is essential
- Do not allow soil to dry out
Celery is very sensitive to inconsistent watering.
Common problems
Poor germination
- Cause: low temperature or old seed
- Fix: increase warmth and use fresh seed
Leggy seedlings
- Cause: lack of light
- Fix: move to a brighter position
Stringy or tough stems
- Cause: lack of water or nutrients
- Fix: maintain consistent care
Bolting (early flowering)
- Cause: stress or temperature fluctuations
- Fix: keep conditions stable
Climate and regional notes
UK & Ireland
- Must be started indoors early
- Needs a long growing season
Europe
- Northern regions require early sowing
- Southern regions may sow earlier
USA
- Start indoors 10–12 weeks before last frost
- Requires steady moisture and warmth
Pro tips for better results
- Sow seeds thinly to reduce overcrowding
- Keep humidity consistent during germination
- Feed regularly once plants are established
- Earth up stems or choose self-blanching types
- Water consistently to prevent tough stems
FAQs: growing celery from seed
When should I sow celery seeds
In early to mid-spring indoors to allow enough growing time.
Do celery seeds need light to germinate
Yes, they should be sown on the surface and not buried deeply.
How long does celery take to germinate
Typically 2–3 weeks, sometimes longer.
Why is celery difficult to grow
It requires consistent moisture and a long growing season.
Can I grow celery in containers
Yes, with sufficient depth and regular watering.
How often should I water celery
Keep soil consistently moist at all times.
What is self-blanching celery
Varieties that naturally produce tender, pale stems without earthing up.
Why is my celery tough or stringy
Usually due to inconsistent watering.
When can I harvest celery
Once stems are well developed and firm.
How long does celery take to grow
Several months from sowing to harvest.