Type
heirloom
Brussels Sprout variety
Long Island Improved Brussels Sprout
A compact heirloom that has been a standard for home gardens for many years. It produces firm green sprouts along sturdy stalks and does best in cool fall weather.
Days to maturity
90-110
Best for
classic fall harvests, heirloom gardens
About Long Island Improved
Long Island Improved is a classic heirloom Brussels sprout with compact plants and firm green sprouts along the stem. It is known for good home-garden reliability and traditional flavor.
Growing Long Island Improved Brussels Sprout
Give plants a long cool season, because warm conditions reduce sprout quality. Harvest from the bottom up as sprouts firm to about walnut size, and remove yellowing lower leaves as needed.
Full growing guide
For planting dates, care, and harvest that apply to all brussels sprouts, see the complete guide.
How to grow Brussels SproutsOther brussels sprouts varieties
Variety characteristics are general guidance for US home gardens; performance varies by climate, soil, and season. Seed and plant availability differs by supplier. Page updated Aug 4, 2026.