Sow Seeds in January – Onion Seeds

January has low light levels and colder temperatures in the UK as it is the Winter season.

However there is one vegetable that once germinated indoors or in a greenhouse, doesn’t mind growing in the cold until Spring, that’s the Onion.

Ever since growing my whopper size onions last August, I seem to have a new obsession with Onions.

This year I would like to grow Onions from Seed to see how it differs from growing from Sets (baby onions).

Benefits of Seed Sowing Indoors

There are number of benefits to sowing seeds indoors at this time of the year, as it can remind you of Spring growth, cheer you up from the cold wet winter and you can get excited about those seedlings popping up from the soil.

Find out what Seeds To Sow in January Indoors here.

Have you ever thought about Sowing Onion Seeds? then get ready for my Onion Seed Sow Along Video. More details below.

Onion Seed Sow Along Event – 11 January 2025

I’m pre-recording a Seed Sow Along Video to show you how to Start Growing Onions from Seed, to be released on Saturday 11 January 2025 on SowGrowHarvest.co.uk

This means you can watch the video when it is convenient to you and Sow Onion Seeds anytime in January or February Indoors.

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What will you need for the Onion Seed Sow Along?

  • Windowsill Seed Tray or cell tray with Lid – I’m using 12 cell Tray with Lid from Amazon.
  • Onion Seeds (see variety choice below), I’m sowing Bonus F1 Onion variety bought from Amazon.
  • Multi-purpose peat free compost or seed compost,
  • A little bit of water and a small watering can,
  • A Warm and light windowsill indoors.

Sowing Onions from Seed – Varieties

I’ve chosen Onion – Variety: Bonus F1 to sow this year.

Bonus F1 – has Downey mildew resistance. As it is a F1 variety, all bulbs will be uniform in size and harvest at the same time.

The following varieties can be sown in January & February for a Harvest in August to September.

Onion Seeds can be purchased from a wide range of online seed suppliers or local garden centres.

Red Onions

  • Kamal F1 – Mildew resistance.
  • Red Baron – Excellent flavour.

Brown Onions

  • Alisa Craig – Great storer.
  • Santero F1 – resistant to Downey Mildew.
  • Bedford Champion – Great storer.
  • Walla Walla – Low sulphur so less tears.
  • Globo – Giant onions, if sown in January.
  • Bonus F1 – resistant to Downey mildew and low sulphur.

Onion Varieties to Sow in January & February

(Click on the photos to read the text)

Growing in January

Seeds to Sow in January Indoors

🪟 A Simple Seed Sowing Setup Indoors

Events – Seed Sow Along Schedule

🌱 Seed Sowing HQ – Other Jobs for January

🧅 Planting Onion Sets in Cell Trays – Video

The Onion Series

Part 1 📕 – Start Growing Onions in wet weather in cell trays with Planting Video

Part 2 📗 – How to Plant Onion Sets in the Ground that have been grown in Cell Trays with Video

Part 3 📘 – Onions from Sets – How To Tell when Your Onions are Ready for Harvest

Part 4 📙 – How To Harvest Onions & Make Your Own Drying Rack

🧄 Growing Garlic with Onions and Leeks

📒 The Essential Guide to Growing Autumn & Spring – Onions from Sets – My Free Ebook

Plant Shallots with Me with Video

All About Growing Onions Page



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