Waltham 29

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WALTHAM 29 is the world's most recognized open-pollinated broccoli variety, valued for its exceptional cold tolerance, reliable production, and abundant side-shoot harvests that extend picking well beyond the main head.

Days from seeding (no.)

95 - 115

Days from transplant (no.)

75 - 95

Heat tolerance

Low

Head size

Medium

Resistant to

Breeding type

Open-pollinated, Heirloom

Crop: Broccoli (Brassica oleracea var. italica)
Breeding type: Open-pollinated (OP)
Plant type: Standard heading
Maturity: Mid–late
Growth habit: Medium-height, stocky, vigorous
Productivity: Moderate–High, Reliable main head, Excellent side-shoot production

Head shape: Round to slightly domed
Head colour: Dark blue-green
Head quality: Dense, Fine-medium bead, Uniform
Head size: Medium

Production window: Cool season
Climate adaptation: Cool, Cool–Temperate, Temperate; performing best under cool growing conditions
Field holding: Good
Resistant to: No officially published disease resistance package

Shelf life: Good
Storage life: 10–14 days under commercial cold storage
Storage sensitivity: Sensitive to heat; prolonged warm conditions accelerate yellowing, bead loosening and quality loss
Market use: Fresh market, Home gardening, Market gardening, Organic production, Freezing, Side-shoot harvests

How consistent is it in different conditions?

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