🌱 What Seeds Need Light to Germinate in February

Some seeds must be exposed to light to germinate properly. In February, when conditions are already challenging, covering these seeds with compost is one of the most common reasons sowings fail. If these seeds are buried, they often rot or never sprout at all.

Here’s a clear UK guide to which seeds need light to germinate in February and how to sow them correctly.

⭐ Recommended Products — February Gardening Essentials

• Early Spring Seed Collection (February Sowing)
A pack of seeds suited for February sowing — think early onions, brassicas, tomatoes, chillies, and early flowers like pansies and primroses. Great for getting a head start on the growing season.
👉 Click here to see top options

• Seed & Cutting Propagation Compost
Fine, well-draining compost formulated for seeds and cuttings. Essential for giving young roots the ideal environment to establish strongly without rotting.
👉 Click here to see top options

• Seed Trays & Propagator Kit
Includes reusable seed trays, modules, and clear lids to create a controlled germination environment. Helps maintain humidity and protects young seedlings.
👉 Click here to see top options

• Heat Mat & Grow Lights for Seed Starting
Provides bottom heat and supplemental light — especially helpful in February’s low light and cooler temperatures to improve germination and early growth.
👉 Click here to see top options

• Plant Labels & Waterproof Marker Set
Keep track of your sowings with durable labels and a weather-proof pen — very useful when starting lots of different seeds in February.
👉 Click here to see top options

🌿 Vegetable Seeds That Need Light

🌿 Celery

• Light required: Yes
• How to sow: Surface sow only — do not cover
• Temperature: 18–21°C

Why it matters:
Celery seeds are tiny and slow. Covering them prevents germination completely.

🌿 Celeriac

• Light required: Yes
• How to sow: Press gently into compost surface
• Temperature: 18–21°C

Tip:
Mist lightly to avoid washing seeds away.

🌿 Herb Seeds That Need Light

🌿 Basil

• Light required: Yes
• How to sow: Surface sow
• Temperature: 18–22°C

Common mistake:
Covering basil seeds causes patchy or failed germination.

🌿 Dill

• Light required: Yes
• How to sow: Surface sow or barely cover
• Temperature: 15–20°C

🌿 Thyme

• Light required: Yes
• How to sow: Surface sow
• Temperature: 15–20°C

🌿 Oregano

• Light required: Yes
• How to sow: Press into compost surface
• Temperature: 18–21°C

🌸 Flower Seeds That Need Light

These are the most commonly affected by incorrect sowing depth.

🌸 Petunias

• Surface sow only
• Needs warmth and strong light

🌼 Lobelia

• Do not cover seed
• Very fine seed — sow thinly

🌸 Begonias (from seed)

• Must have light
• Sow on fine compost, no covering

🌼 Antirrhinums (Snapdragons)

• Light aids germination
• Press into surface gently

🌸 Verbena

• Needs light and warmth
• Can be slow and uneven

💡 How to Sow Light-Requiring Seeds Correctly

Best method in February:

• Use fine seed compost
• Level and lightly firm the surface
• Scatter seeds thinly
• Press gently into compost
• Do not cover with compost
• Water by misting or from below

Optional: Cover trays with clear lids or plastic to retain moisture — remove once seeds germinate.

❄️ February-Specific Tips

• Keep compost just moist, never wet
• Provide the brightest light possible
• Avoid placing trays against cold glass at night
• Be patient — light-dependent seeds often germinate slowly

❌ Common February Mistakes

• Covering light-requiring seeds
• Watering too heavily and washing seeds away
• Using coarse compost
• Keeping seeds too cold or too dark

🌱 Golden Rule for Light-Germinating Seeds

If the seed is tiny, it almost always needs light.
When in doubt in February: don’t cover it.