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For both novice and experienced gardeners alike, growing spring onions is a great idea. They can be thrown into a range of dishes such as salads, to add a delicious flavour. Spring onions tick all the right boxes to be an essential spring and summer crop to hand.
However, despite their common name, spring onions can be sown anytime from March to September. Sometimes even as late as October. Provided they are sown in the ideal conditions.
Get ready to grow in time for a spring harvest…
When sowing later in the season (September – October), the best seeds to use are White Lisbon. This variety of spring onions are highly popular among gardeners. Mainly because this particular type of spring onion performs very well when overwintered.
In fact, White Lisbon spring onions are so winter hardy they received an RHS Award of Garden Merit for it. They are also great for gardeners who are struggling for space or budget. These plants are quite affordable as seeds and work well when grown in containers.
October is the final chance to sow spring onions for a spring harvest. So, now is the perfect time to share top tips for sowing and growing White Lisbon spring onions.
How to Sow and Grow Spring Onions
Sow Indoors
- – We recommend beginners to sow indoors in October because plants and seedlings are sensitive to the potential frosty weather.
- – Sow seeds in trays of compost ½ an inch deep, covering them with ¼ inch of compost.
- – Keep the seeds moist and within a temperature between 15 to 18 °C.
- – They should start to germinate from 7 to 14 days.
Sow Outdoors
- – Sow seeds thinly into shallow drills 1.5cm deep, with rows spaced 30cm apart.
- – Water and keep the seed’s environment moist.
- – Once the seeds have germinated and developed into a substantial young plant, cover them with cloches.
Please note that once transplanting spring onions outdoors, they should be spaced 30cm apart as per sowing outdoor instructions.
Discover More Growing Guides:
Spring Onions Cultivation and Care
Sunlight and drainage
When choosing the permanent growing positions of your spring onions, make sure you set them in a place with full sunlight and is well-draining.
Weeds
Make sure the growing area is free of weeds.
If weeds establish in the growing positions, the spring onion plants will suffer in their yield potential due to competing for water, nutrients and space to grow.
Watering
Spring onions need to be well watered throughout their growth. This is because of their short root length.
By keeping them well watered, you sustain them to ensure they produce the best quality crops. Even during cold but dry periods throughout winter.
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