Thompson & Morgan Onion Hi Keeper F1 Hybrid - 1 Seed Packet
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Product Information
Full details
The Thompson & Morgan Onion Hi Keeper F1 Hybrid is an excellent choice for home gardeners seeking reliable, high-yield vegetable crops that offer exceptional winter hardiness. Perfectly suited for both autumn indoor sowing and spring direct sowing, this variety produces uniform, high-quality yellow-skinned globe bulbs reaching up to 120g. While this F1 hybrid provides robust growth and disease resistance, gardeners should note that success requires well-drained, fertile soil and careful site preparation to avoid common pests and rot.
All features
| Model Part Number | 23652 |
|---|---|
| Brand | Thompson & Morgan |
Extended Product Information
FAQs
When is the best time to sow these seeds?
You can sow them indoors in the autumn for overwintering or directly outdoors in the spring.
How deep should I plant the seeds?
Sow the seeds at a depth of 1cm (1/2 inch).
Can I plant these in fresh manure?
No, you should avoid planting onions in freshly manured soil; it is best to use well-rotted compost.
How do I get larger bulbs?
Thin the seedlings slightly more than the standard 10cm (4 inches) to give the bulbs more room to expand.
What companion plant helps with onion fly?
Planting mint alongside your onions can help confuse and deter the onion fly.
Are these suitable for raised beds?
Yes, raised beds are highly recommended, especially if your native garden soil is heavy or poorly drained.
Troubleshooting
Seedlings look weak or spindly
Ensure they are receiving adequate light; if indoors, move to a brighter window or use a grow light.
Bulbs are rotting in the ground
The soil is likely too wet; ensure the site is well-drained or move planting to a raised bed for better drainage.
Stunted growth
Check for weed competition and ensure the soil was prepared with organic compost; avoid planting in soil that has been freshly manured.
Pros and Cons
Pros
- Excellent winter hardiness for early success
- Reliable F1 hybrid consistency
- Versatile planting schedule for spring or autumn
- Good pest management potential with companion planting
Cons
- Requires well-drained soil to prevent rot
- Not suitable for planting in freshly manured ground
- Specific spacing requirements to achieve desired bulb size
Setup, Compatibility & Care
For optimal growth, position your onions in a spot that receives full, direct sunlight throughout the day. Avoid areas that have been freshly manured, as this can encourage rapid leafy growth at the expense of bulb formation. Keep the planting area free of weeds, as onions do not compete well for nutrients. If you are planting in autumn, ensure your indoor sowing space is bright and cool to prevent the plants from becoming 'leggy' before they are transplanted.