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Waltham 29 Broccoli

Waltham 29 Broccoli

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Waltham 29

90 days — 'Waltham 29' broccoli was bred to withstand the increasing cold of fall and therefore is not the best choice for early spring planting. If sown too early in the summer, the center heads may flower prematurely. In most circumstances, it is best to time your planting for late summer, fall, or even winter harvests. The plants are compact with large crops of side shoots and solid medium green heads. Make sure to keep up with harvesting to maximize your total yield of shoots. It reportedly can survive dry spells.

Bred by the Agricultural Experiment Station in Waltham, Massachusetts and introduced in 1951.[1] Originally developed for fall harvest in the Atlantic states and the Northwest,[2] 'Waltham 29' seems to be well-adapted to most regions. Each packet contains 0.5 gram, which is approximately 125 to 175 seeds.
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Planting Instructions: Start indoors, six weeks prior to your last expected frost date. Transplant when three inches tall. Plant the seedlings about one inch deeper than they were in your pots. Work ½ cup of organic fertilizer into the soil with each transplant.

You can also plant directly in the soil, at a depth of about ¼ to ½ inch, in mid-Spring. Thin to a final plant spacing of 15 to 18 inches in rows two to three feet apart.

Avoid providing too much nitrogen. Broccoli likes cool weather and will head too early in warm temperatures. Harvest the heads before the individual flowers mature and begin to open.
Informational References:
  1. "A Descriptive Catalogue of Vegetables for Processing," Associated Seed Growers, Inc., New Haven 2, Connecticut, 1955.
  2. "Report of the Agricultural Experiment Stations, 1951," Office of Experiment Stations, Washington, D.C., January, 1952.