BROCCOLI ‘WALTHAM 29’ Seeds
Botanical Name: Brassica oleracea var. italica
‘Waltham 29’ is a time-tested heirloom broccoli variety renowned for its dependable yields and robust flavour. It forms large, uniform green heads with tightly packed florets and produces side shoots after the main head is harvested, extending the picking window. This cool-season crop thrives in New Zealand’s spring and autumn gardens, offering excellent nutritional value and versatility in the kitchen.
- Large, uniform green heads with tender, flavourful florets
- Harvest whole or cut individual florets over time
- Performs best in cool weather—ideal for spring or autumn sowing
- Rich in vitamins C and K; excellent for steaming, stir-fries, or salads
- Heirloom variety with proven garden performance
Plant Details
- Plant Type: Annual cool-season vegetable
- Plant Height: Up to 75 cm
Sowing Information
- Germination: 7–14 days
- Depth: Sow 0.5–1 cm deep
- Position: Full sun to partial shade
- Sow Where: Direct into garden beds or start in trays and transplant
- Soil Type: Fertile, well-drained soil; pH 6.0–7.5
- Spacing: 30–45 cm between plants
Growing Tips for New Zealand Gardeners
- Water consistently to maintain even soil moisture, especially in dry spells
- Feed with a nitrogen-rich fertiliser every 2–3 weeks during early growth
- Harvest main head before it loosens; side shoots will follow
- Space plants well to improve air circulation and reduce disease risk
- Mulch to keep soil cool and moist in warmer months
Harvest
Ready 70–100 days from sowing. Cut the central head before it begins to flower. Side shoots will continue to develop for additional harvests.
When to Sow Broccoli ‘Waltham 29’ in New Zealand
| NZ Region | Sowing Window | Tips |
|---|---|---|
| North Island – Upper (e.g. Auckland, Bay of Plenty) | March–June, August–September | Sow early autumn or late summer for best results. Shade seedlings if planting in warmer months. |
| North Island – Lower (e.g. Wellington, Taranaki) | March–June, August–September | Excellent for autumn cropping. Mulch and feed regularly. |
| South Island – Northern (e.g. Nelson, Marlborough) | March–June, August–September | Avoid mid-winter sowing. Side shoots extend harvest period. |
| South Island – Central & Southern (e.g. Canterbury, Otago) | August–September | Sow in early spring. Use cloches or row covers if frost is expected. |
