Spring Onion Seeds 'White Lisbon' - Marshalls Garden - 750 Seeds
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This guide is for home gardeners and allotment holders seeking a reliable, high-yield spring onion variety. The 'White Lisbon' offers a mild, crisp flavor and quick maturity, making it ideal for continuous harvests. A key consideration is its need for consistent moisture for optimal growth.
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| Model Part Number | 750 Seeds |
|---|---|
| Brand | Marshalls Garden |
Extended Product Information
FAQs
When is the best time to sow 'White Lisbon' seeds?
You can sow 'White Lisbon' seeds from early spring (as soon as the soil can be worked) through to late summer for continuous harvest. For overwintering, sow in early autumn.
How far apart should I space the spring onions?
After thinning, aim for a spacing of about 5cm (2 inches) between plants. Rows should be spaced about 15-20cm (6-8 inches) apart.
Can I grow 'White Lisbon' in containers?
Yes, 'White Lisbon' is well-suited for container gardening. Ensure the pot is deep enough for root development and has good drainage.
How do I prevent spring onions from becoming too pungent?
Keep the soil consistently moist and harvest them while they are young and tender. Overly dry conditions can lead to a stronger, more pungent flavor.
What does 'successional sowing' mean?
Successional sowing means planting seeds of the same crop at regular intervals (e.g., every 2-3 weeks) to ensure a continuous harvest rather than a single large crop all at once.
Will these seeds overwinter in the ground?
Yes, 'White Lisbon' is hardy and can overwinter if sown in early autumn. This provides an early harvest in the following spring.
What is the RHS Award of Garden Merit?
The Award of Garden Merit (AGM) is a prestigious award given by the Royal Horticultural Society to plants that have demonstrated excellent garden performance and suitability for home gardeners.
Troubleshooting
Seeds not germinating
Ensure seeds are sown at the correct depth, soil is kept consistently moist, and temperatures are suitable for germination (around 10-20°C).
Onions are thin and weak
Thin seedlings adequately to give them space. Ensure they receive enough nutrients through fertile soil or appropriate feeding.
Onions bolting (going to seed prematurely)
Ensure consistent watering, especially during hot or dry spells. Avoid disturbing the roots excessively. Choose a hardy variety like 'White Lisbon' which is less prone to bolting than some others.
Pests attacking seedlings
Use row covers to protect young plants from pests like onion fly. Keep the garden area clean to reduce pest habitats.
Pros and Cons
Pros
- Produces high-quality onions with a desirable mild flavor.
- Fast maturity allows for quicker harvests and successional planting.
- Hardy nature extends the growing season and provides overwintering potential.
- Adaptable to different growing conditions and spaces.
- Reliable yield from spring through autumn.
Cons
- Requires consistent moisture to prevent bolting and ensure crispness.
- Susceptible to pests like onion fly if not managed.
- Can bolt (go to seed) in very hot or dry conditions if not watered adequately.
- 750 seeds is a large quantity for small-space gardeners.
Setup, Compatibility & Care
Sowing: Sow seeds directly into well-drained soil from early spring to late summer. For overwintering, sow in early autumn. Aim for a sowing depth of about 1cm (1/2 inch). Space rows about 15-20cm (6-8 inches) apart.
Thinning: Once seedlings are established, thin them to about 5cm (2 inches) apart to allow the onions space to develop.
Watering: Keep the soil consistently moist, especially during dry periods, to ensure crisp growth and prevent bolting. Avoid waterlogging.
Soil: Prefers fertile, well-drained soil. Amend heavy soil with compost for better drainage.
Sunlight: Full sun to partial shade is ideal.
Pest Control: Monitor for onion fly and consider row covers or companion planting to deter pests.
Harvesting: Harvest by pulling the onions gently from the ground when they reach the desired size, typically 8-10 weeks after sowing. You can also cut them at the base, leaving the roots to potentially regrow.