And seeds produce female as well as male plants. Female plants produce less than males for they use much of their energy to set seeds and grow foliage, while male plants put all their energy into making spears. Experts recommend identifying the female plants early on and removing them. With crowns, you can get male plants only. Start with a dozen.
Crowns look a bit like tangled spaghetti.
Jersey Giant' is more productive than 'Jersey Knight' in cold areas, such as Michigan, and is adaptable to a variety of growing conditions, while retaining good disease resistance. They grow enthusiastically from the southwest up to Washington State. These hybrids are not all male, however. Choose the site carefully and your asparagus will grow there for years to come. Allow both vertical and horizontal space for the ferny leaves that asparagus grows after it's finished producing spears.