Sweet Peas in October: Check Their Winter Home First
Sowing sweet peas in autumn starts with a bright, cool winter space. Here is how to prepare and sow in deep pots.
Cover image: AI-generated illustrative image.
Sometimes summer begins with a decision in October: do I have a suitable winter home for young plants? For annual sweet peas (Lathyrus odoratus), that is the key question before sowing in autumn. A bright, cool cold frame or unheated greenhouse, with protection during hard frosts, may be suitable. If you do not have that space, spring sowing is the better choice.
Check the winter space before sowing
British gardening sources describe October and November as a possible sowing window. This is not a blanket recommendation for every location in Germany. Your winter conditions and the instructions on the seed packet matter. A warm indoor windowsill is no substitute for a suitable overwintering space: too much warmth and too little light encourage weak, leggy growth.
Four steps to sowing
Prepare the pots
Fill clean, deep pots with a loose, free-draining growing medium. Keep the drainage holes clear and position the containers so excess water can escape.
Sow individually
Sow one seed per pot, cover with about 1 cm of growing medium and water gently. Label the pots with the species, variety and sowing date. Soaking is not a necessary step.
Allow to germinate
Around 15 °C is a guide for germination. Keep the growing medium evenly moist rather than wet. Remove any cover once the seedlings emerge.
Grow on in cool, bright conditions
Move the seedlings to a cool, bright position. Ventilate in mild weather and provide extra protection during hard frosts. Check moisture regularly rather than watering to a fixed schedule.
Waiting can be a good gardening plan
If you do not have a suitable winter space, you can get the pots and seeds ready now and start in spring. Before planting out later, gradually acclimatise the young plants to outdoor conditions. Timing depends on your location and the weather.
Important: Sweet peas are ornamental plants, not edible peas. Do not eat the seeds or pods; label seeds clearly and keep them separate from edible peas.
Sources: RHS: How to grow lathyrus, National Sweet Pea Society: Growing and RHS: non-edibility warning. British sowing guidance has been adapted cautiously to differing winter conditions.
