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Waltham 29 - Organic Broccoli Seeds

SKU: VBI103
Open-Pollinated
Certified Organic
Heirloom
$5.95
Choose size

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Waltham 29 broccoli is a dependable heirloom developed for cool-season gardens, producing blue-green main heads followed by smaller side shoots after the first cut. Released from Massachusetts breeding work in the mid-1900s, it became a standard home-garden broccoli for its reliability and useful harvest window.

The plants are sturdy, productive, and especially well suited to fall crops. Cut the central head while buds are still tight, then keep watching for side shoots. Waltham 29 gives broccoli season a second helping.

Scientific name: Brassica oleracea
Life cycle: Annual
Days to maturity: 60-90 days from sowing
Broccoli type: Heading

Every order is packed with care by our small team in Pennsylvania and typically ships within 2–3 business days—often by the next business day. We ship throughout the United States using USPS and UPS.

Unopened items may be returned within 30 days of delivery. If an order arrives damaged, incomplete, or incorrect, please contact us so we can make it right.

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We stand behind every packet we sell. Our seeds are carefully selected, tested for germination, untreated, and guaranteed to be true to variety.

Your seeds are covered for one year from the date of purchase. If they fail to germinate under reasonable growing conditions, arrive damaged, or do not grow true to type, contact us and we’ll make it right with a replacement, store credit, or refund.

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FAMILY OWNED

Hand packed in Pennsylvania by our family.

LAB TESTED

Third-party tested for reliable germination.

NON-GMO

Open-pollinated varieties for home gardens & seed saving.

UNTREATED SEED

Never coated with chemical seed treatments.

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Broccoli Growing Basics

Broccoli developed from wild Mediterranean cabbages and has been cultivated in Italy for centuries. Most familiar varieties form one large central head followed by smaller side shoots, while sprouting types produce many smaller stems over a longer season.

The edible heads are clusters of unopened flower buds. Broccoli grows best when plants develop steadily in fertile soil and the heads mature during cool weather.

Start seeds indoors about 5–7 weeks before transplanting. Set spring plants outdoors roughly 3–4 weeks before the expected last frost once they are hardened off and conditions are reasonably settled.

Broccoli forms its best heads in cool weather and may struggle when heads mature during sustained heat. For a fall crop, count backward from the variety’s days to maturity and allow extra time for slower autumn growth.

Sow seeds ¼–½ inch deep in moist seed-starting mix. Provide bright light after emergence and keep seedlings growing steadily in cool, moderate conditions.

Harden plants gradually before transplanting and space them about 18–24 inches apart. Avoid holding seedlings too long or exposing large transplants to prolonged cold, which can lead to small, premature heads.

Choose a site with full sun and fertile, well-drained soil enriched with finished compost. Maintain balanced fertility and avoid excess nitrogen, which can encourage leafy growth at the expense of firm heads.

Keep the soil evenly moist, especially while heads are forming, and mulch with clean straw, shredded leaves, or another organic material. Drought, root disturbance, and sudden swings in growth can reduce head size and quality.

Harvest when the central head is full, firm, and tightly closed, before individual buds loosen or show yellow flowers. Cut the head with several inches of tender stem attached.

Leave the plant in place after the main harvest. Many varieties will produce smaller side shoots for several additional pickings, especially during cool weather.

Full Broccoli Growing Guide