Leek Seeds 'Norwich' F1 - Unwins
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Full details
This guide is for home gardeners looking to grow reliable leeks with a good yield. The Unwins Leek 'Norwich' F1 seeds offer a vigorous, upright variety that can be harvested at baby or full size, providing smooth shanks ideal for winter soups. A potential caveat is the need for consistent moisture and regular feeding for optimal results.
All features
| Model Part Number | 30310883 |
|---|---|
| Brand | Unwins |
Extended Product Information
FAQs
When is the best time to sow Unwins Leek 'Norwich' F1 seeds?
You can sow indoors from February to April or outdoors from March to April for subsequent transplanting or direct sowing.
How far apart should I plant the leek seedlings?
Plant seedlings 20cm apart in rows that are 30cm apart.
How do I get long white stems on my leeks?
Gradually draw soil up around the base of the leeks as they grow. This process is called 'earthing up' and prevents the lower part of the stem from being exposed to light.
Can I harvest these leeks as baby leeks?
Yes, they can be harvested as baby leeks, or allowed to grow to full size for a larger crop.
What is the typical harvest period for these seeds?
The harvest period is generally from October to March, providing a good supply through the autumn and winter months.
Do these seeds require specific soil conditions?
They are adaptable to most garden soils but perform best in well-drained soil with consistent moisture and good fertility.
What does 'slow to bolt' mean for leeks?
'Slow to bolt' means the plant is less likely to prematurely send up a flower stalk, which can affect the leek's texture and flavor, ensuring more of the plant's energy goes into developing the edible stem.
Troubleshooting
Seeds fail to germinate
Ensure soil temperature is within the recommended range (10-15°C) and that seeds are kept consistently moist but not waterlogged. Check if seeds are still within their viable period.
Seedlings are weak or leggy
Provide adequate light if grown indoors. Ensure consistent moisture. Consider a diluted liquid feed once true leaves appear.
Leeks are not developing long white stems
Ensure you are 'earthing up' the soil around the base of the leeks regularly as they grow. This process shades the lower stem from light, encouraging blanching.
Pests such as onion fly or slugs
Use netting to deter flies. Encourage natural predators for slugs or use appropriate organic slug deterrents. Ensure good air circulation around plants.
Pros and Cons
Pros
- Versatile harvesting options (baby or mature leeks).
- Reliable F1 hybrid for strong growth and uniformity.
- Suitable for both indoor and outdoor sowing.
- Produces smooth leeks, ideal for cooking.
- Slow to bolt, extending the harvest window.
Cons
- Requires consistent watering.
- Needs regular feeding for best results.
- Requires earthing up for long white stems.
- Starts from seed, requiring a germination period.
Setup, Compatibility & Care
Sowing Indoors: Begin by sowing thinly into pre-watered seed trays about 1cm deep. Maintain a temperature of 10-15°C and ensure the soil remains consistently moist. Once seedlings reach approximately 20cm tall, they are ready for planting out.
Planting Out (from indoor sowing): Prepare holes that are 15cm deep. Carefully place the seedlings into these holes and then fill with water. Space plants 20cm apart within rows, and ensure rows are 30cm apart.
Sowing Outdoors: Sow seeds thinly directly into pre-watered soil, 1cm deep. Aim for rows that are 30cm apart. Keep the soil moist and thin the seedlings to stand 20cm apart once they have established.
Aftercare: To achieve long white stems, gradually draw soil up around the base of the leek plants as they grow. Consistent watering is crucial, especially during dry periods. Regular feeding with a balanced liquid fertilizer will promote healthy development.
Compatibility: Suitable for most garden soils. Ensure a sunny or partially shaded location.
Care: Monitor for pests and diseases. Keep the area weed-free. Earthing up is essential for producing blanched stems.