C. pepo. The large, open, bushy heirloom plant produces distinctively ribbed Italian heirloom zucchini 30-40cm (12-16 inches).
Fruit are long with pale green flecks and ribs on dark, grayish green skin.
Romanesco zucchini seeds produce fruits that have a very pleasant nutty taste and a presence that transcends the world of ordinary zucchini.
Technically, Romanesco is a type of cocozelle squash, as it develops a bulbous end – zucchinis are traditionally evenly thick along their length. Some sources list this old variety as Costata Romanesca, or “ribbed Roman.”
Matures in 55 days. (Open-pollinated seeds)
Starting Zucchini Seeds
For transplants, start seeds indoors in late April or early May.
Optimal soil temperature for germination: 25-35°C (68-95°F). Seeds should sprout in 7-14 days.
Direct sow or transplant in late May or early June when soil is warm.