½ inch deep Broccoli and cauliflower seeds should be sown at a depth of four times the size of the seed, or 12 inch, and properly hydrated. Once the seeds have germinated, the soil should be kept mildly wet.
How deep must broccoli seeds be planted?
How to Grow Broccoli If beginning seedlings outdoors, plant seeds 1/2-inch deep and 3 inches apart. Once seedlings have reached a height of 2 to 3 inches, space them 12 to 20 inches apart. If you planted seeds indoors, plant transplants that are 4 to 6 weeks old (and have 4 or 5 leaves) in holes that are somewhat deeper than their container depth and 12 to 20 inches apart.
How many broccoli heads does one plant produce? Each plant will produce one huge head. In the following weeks after harvesting, it will develop a number of tiny side flower heads.
Does broccoli regrow annually?
Does broccoli return annually? – Broccoli is a biennial, meaning it grows in the first year and blossoms in the second; but, if planted in the spring, broccoli plants can go to seed in the first year. There are no broccoli types that return year after year. Broccoli is not a perennial plant, there are no USDA hardiness zones for it, and it must be returned to the garden each in order to be grown.
The optimal time to grow broccoli seeds indoors is seven to nine weeks before the final frost at a temperature of 70 to 75 degrees Fahrenheit. Additionally, they can be seeded outside two weeks before the final frost. In zones 8 and warmer, sow in late summer for a winter harvest.