White Onion Sets - Centurion - 250
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The Centurion White Onion Set from Carbeth Plants is designed for home gardeners and allotment holders seeking a high-yielding, reliable crop with a classic crisp flavor. Renowned for producing semi-round, golden-yellow bulbs that store exceptionally well, this variety is an RHS Award of Garden Merit winner, making it a dependable choice for novice and experienced growers alike. While it thrives in most UK garden conditions, growers must ensure they provide a location with full sun exposure to achieve the best results.
All features
| Model Part Number | ONIONCENT-250 |
|---|---|
| Brand | Carbeth Plants |
Extended Product Information
FAQs
When is the best time to plant Centurion onion sets?
You should plant them in the UK from winter through early spring, as soon as the ground is workable.
How do I know when to harvest?
Harvest when the leaves begin to yellow and fall over; generally, wait two weeks after this point to pull them up.
Do these onions store well?
Yes, Centurion is specifically known for its excellent storage qualities once properly cured.
Can I grow these in containers?
Yes, they perform well in deep pots or containers provided they receive full sun and good drainage.
What is the RHS Award of Garden Merit?
It is an award given by the Royal Horticultural Society to plants that have performed reliably in garden trials.
Troubleshooting
Onion sets failing to sprout
Check soil temperature and moisture levels; sets may rot if planted in cold, waterlogged soil.
Bulbs remaining small
Ensure the plants are not overcrowded and are receiving at least 6-8 hours of direct sunlight per day.
Leaves turning yellow too early
Inspect for pests like onion fly or signs of nitrogen deficiency in the soil.
Pros and Cons
Pros
- Winner of the RHS Award of Garden Merit
- Exceptional storage qualities for post-harvest use
- High-yielding variety suitable for small spaces
- Easy to grow for beginners and experienced gardeners
- Produces high-quality, uniform, golden-yellow bulbs
Cons
- Requires full sun exposure to reach maximum potential
- Specific planting window must be followed for best results
- Susceptible to pests like onion fly if not properly managed
Setup, Compatibility & Care
For the best results, clear your planting area of weeds and incorporate organic matter into the soil to improve drainage and fertility. Push the sets into the soil so that only the tips are visible, spacing them about 10cm apart in rows 30cm apart. Ensure the bed receives maximum daily sunlight. During dry spells in late spring, water the plants moderately to support early development, but reduce watering as the harvest period approaches to prevent rot. Always store the sets in a cool, dry place before planting to prevent them from drying out or sprouting prematurely.