Important: This product & any other product bought along with it will be delivered to you at the start of October 2025.

Description: Senshyu Yellow onion sets are a fantastic choice for home gardeners in Ireland looking to grow flavorful and robust onions. Senshyu Yellow onion are a hardy variety with mild flavour.

Known for their excellent storage capabilities and versatility in cooking, these onion bulbs are perfect for salads, soups, and stews. Senshyu Yellow onion sets are ideal for planting in the autumn, offering a generous harvest by late spring to early summer.

 They have a lovely golden-brown skin and a sweet, mild flavor, making them a favorite among gardeners and chefs alike. With the right care, these onion sets can thrive in various soil types and conditions, ensuring a bountiful harvest.

Benefits of Senshyu Yellow Onion Sets:

• Flavour: These onions have a sweet and mild taste that enhances a variety of dishes, making them a staple in any kitchen.
• Storage: Senshyu Yellow onions are known for their excellent storage life, allowing you to enjoy your harvest long after picking.
• Versatility: Perfect for raw salads, cooking, or pickling, they are a versatile ingredient that suits many culinary styles.
• Easy to Grow: These onion sets are easy to plant and grow, making them suitable for both novice and experienced gardeners.
• Adaptable: Senshyu Yellow onions thrive in various soil types, ensuring successful growth across different gardening conditions.

Available in quantities of:

75 bulbs & 250 bulbs. 

Planting: September to November

Origin: France

Certified Organic: No

How To Grow Senshyu Yellow Onion Sets

1. Before you start

• Choose the right spot: Full sun (6–8 hrs). Well-drained soil is essential - use raised beds if your ground gets waterlogged.

• Soil prep: Work in compost and a balanced, slow-release fertiliser. Avoid fresh manure. Target pH 6.0–7.0.

• Crop rotation: Don’t plant onion sets where onions/garlic/leeks grew in the last 3–4 years if possible.

2. When to plant onion sets

• Autumn-planting onion sets (e.g., Senshyu Yellow, Radar, Electric): September–November.Harvest June–July.

3. Planting onion sets

1. Rake soil level and firm lightly.

2. Set each bulb with the pointed tip up, just the tip showing (about 2–3 cm deep).

3. Spacing: 10–12 cm between sets; 25–30 cm between rows. For bigger bulbs, space 12–15 cm.

4. Water in well.

5. Bird protection (optional): Cover with fleece or netting for 2–3 weeks so birds don’t pull up the sets.

4. Early care for onion sets

• Weeding: Keep beds weed-free; onions hate competition. Hand-weed around bulbs.

• Mulch: A light mulch helps moisture retention and suppresses weeds (keep it off the necks).

• Frost: Autumn-planted onion sets are hardy; no special protection needed unless an extreme cold snap is forecast.

5. Watering & feeding

• Water: Steady moisture in spring while foliage is building. Aim for evenly moist, not soggy.

• Feed: A light nitrogen feed in early spring boosts leafy growth. Stop feeding once bulbs start to swell.

• Stop watering when most bulbs have sized up (late spring/early summer) to encourage skins to dry.

6. Common issues (quick checks)

• Bolting (flower stalks): More likely after cold snaps. Snip off flower stalks promptly; those bulbs should be used first (they won’t store long).

• Pests: Onion fly/thrips - use mesh/fleece early, encourage good airflow, and avoid damaged sets.

• Diseases: White rot/downy mildew - practice long rotations and don’t move contaminated soil or tools between beds.

7. Harvesting onion sets

• Signs they’re ready: Tops yellow and fall over, necks soften, outer skins papery.

• Choose a dry spell. Loosen with a fork and lift gently - don’t bruise the bulbs.

• If weather is wet, lift and move to a dry, airy place straight away.

8. Curing (essential for long storage)

• Lay onions in a single layer on racks or newspaper in a warm, airy, shaded spot for 10–21 days.

• They’re cured when necks are dry and skins rattle. Brush off loose soil (don’t wash).

9. Storing your onions

• Trim: Cut roots off and trim tops to 2–3 cm, or braid the tops.

• Where: Cool, dry, dark, well-ventilated place (garage/shed). Avoid plastic bags - use mesh sacks, crates, or braids.

• Temperature: Cool is best (around 4–10°C).

• Check monthly: Remove any soft or sprouting bulbs.

• Use order: Eat any nicked or thick-neck bulbs first; they don’t store as long.

10. Quick calendar (Ireland)

• Sept–Nov: Plant autumn onion sets.

• Apr–May: Weed, water, light feed; remove any flower stalks.

• Jun–Aug: Bulbs size up; stop watering; harvest when tops flop; cure and store.

Pro tips for bigger, better bulbs

• Space a little wider for larger bulbs.

• Keep beds consistently moist in spring, then go dry for curing.

• Rotate crops and keep tools clean to prevent disease.