BROCCOLI ‘WALTHAM 29’ Seeds
Botanical Name: Brassica oleracea var. italica
- Classic heirloom broccoli variety with large, uniform blue-green heads.
- Tender, delicious florets rich in vitamins C and K—perfect for steaming, stir-fries, or raw in salads.
- Reliable performer in cool weather, making it ideal for Australian spring and autumn planting.
- Produces side shoots after the main head is harvested for extended cropping.
- Sturdy plants grow to around 75 cm tall with excellent yield potential.
Broccoli ‘Waltham 29’ is one of the most trusted heirloom broccoli varieties, valued by home gardeners and market growers for its consistency and flavour. Suited to cooler climates across Australia, this variety thrives in fertile, well-drained soil and rewards growers with an abundant harvest. For a full seasonal overview of different broccoli types, see our Complete Guide to Growing Broccoli Varieties in Australia.
Plant Details
- Plant Type: Annual, cool-season crop
- Mature Height: Up to 75 cm
- Frost Hardy: Yes – tolerates light frosts
Sowing Information
| Climate Zone | Best Sowing Time |
|---|---|
| Temperate | March – June, August – September |
| Subtropical | March – April, August – October |
| Tropical | Not recommended – prefers cooler climates |
| Cool | August – September |
| Arid | March – April |
- Germination: 7 – 14 days
- Sowing Depth: 0.5 – 1 cm
- Spacing: 30 – 45 cm between plants
- Sunlight: Full sun to partial shade
- Soil: Fertile, well-drained soil with pH 6.0 – 7.5
Growing Tips
- Keep soil consistently moist, especially during dry spells, to prevent bolting.
- Fertilise every 3–4 weeks with a nitrogen-rich liquid feed for strong leafy growth.
- Mulch around plants to conserve moisture and regulate soil temperature.
- Rotate crops annually to reduce the risk of soil-borne pests and diseases.
- Check regularly for cabbage moth caterpillars and protect young seedlings with netting if needed.
Harvest
Harvest in 70 – 100 days from sowing. Cut the central head when compact and firm, then allow side shoots to continue developing for multiple harvests.