Chilli Pepper & Tomato Seed Germination Guide

April 14, 2025

🌱 Germinating Chilli Pepper & Tomato Seeds – Step-by-Step

Here's how to germinate your seeds successfully.

Use seed trays, mini-greenhouse, or small pots 5–10 cm deep. 6 packs also work great.
Ensure drainage holes are present to avoid soggy roots.

Germination success starts with the right mix.
Don't use garden soil or regular potting mix.
- They hold water and have large particles that hinder seedling emergence.
Investing in a quality seed-starting mix, such as our seed rmix, improves germination and establishes seedlings quicker.
- You only need a little—one bag lasts a long time as you only need it for this stage.

Tomatoes: Sow 6-8 weeks before the last frost in your area.
- In Marlborough this is around mid of September.
Chilli Peppers: Sow 8-10 weeks before the last frost in your area.
- In Marlborough this is around end of August.

Fill trays or pots with potting mix.
- I like to tamp down if using cells to compact the soil before drilling the hole.
Use a stick or finger to drill a 5–10 mm deep hole
Cover back over and mist the surface with water to settle the soil in.
Cover with a humidity dome or clear lid so it doesn't dry out.
- Mini-greenhouses are great for this step.
Place in a warm, bright area—not in direct sun.
- Think windowsill or table, greenhouse if you have it.

Water gently to keep the top layer evenly moist, not soggy.
- This is important — otherwise seeds will rot or dry out and stop germination.
A heat mat — see the one we use here — is a great investment; you want temperatures around 25°C.
Ventilate daily to prevent mould.
- If using the mini-greenhouses, part open the vents.

Crop Days to Germinate Ideal Temp

Tomato 5–10 days 22–25°C

Chilli Pepper 7–21 days 24–28°C
Note: Peppers take longer, especially the chinense species, and benefit from bottom heat!

Crop	Days to Germinate	Ideal Temp
Tomato	5–10 days	22–25°C
Chilli Pepper	7–21 days	24–28°C

Remove covers once seeds sprout with no vents, with vents open fully.
Make sure to keep seedlings in a bright area (greenhouse or sunny windowsill).
Water gently from the bottom or use a gentle pour on the surface.
Once seedlings develop 2–3 true leaves, pot them into their next pot.
Best to pot seedlings at this stage in smaller pots, ~4-6 inch pots.
Once adapted to the new pot, 1-2 weeks, then pot them in the ground or a large pot.

🛒 Shop Seedling Pots & Trays

Capsicum chinense (e.g., Habanero, Fatalii Jigsaw, Bhut Jolokia):
Super Hots can be very slow and difficult to germinate — place seeds between damp paper towels inside a ziplock bag, and keep in a warm place (25–28°C).
If you have a heated floor this works great. Check daily and pot up once seeds just start to sprout.
If you don't have a heat mat, a hot water cupboard can work to aid in germination, but make sure to get the seeds out as soon as you see them coming through the soil.