Crisphead varieties, like the familiar pale iceberg lettuce from the grocery store, can be a little tricky to grow here in the Midwest; they're quick to rot or go to seed when the weather turns hot.
Mineral nutrition of
crisphead lettuce grown in a hydroponic system with brackish water.
Spiny amaranth (Amaranthus spinosus L.), a serious competitor to
crisphead lettuce (Lactuca sativa L.).
For that essential crunch, grow sweet Little Gem cos lettuce that comes with either red or green leaves, and do not forget the
crisphead Iceberg that has a really crunchy core.
Crisphead lettuce 'Telluride' was seeded on May 16, 2013, in two rows per bed and germinated using sprinklers.
Of the four main types of lettuce--leaf lettuce,
crisphead (iceberg and the like), romaine and bibb--leaf lettuce is the most nutritious.
UNTRITION FACTS ON LETTUCE Type of lettuce * (1 cup) Potassium Vitamin Folate Calcium A Iceberg (also called 102 mg 361 IU 21 mcg 13 mg
crisphead) Romaine or Cos 116 mg 4,094 IU 64 mcg 16 mg Butterhead (Boston, Bibb) 131 mg 1,822 IU 40 mcg 19 mg Green leaf 70 mg 2,665 IU 14 mcg 13 mg Red leaf 52 mg 2,098 IU 10 mcg 9 mg Type of lettuce * (1 cup) Fiber Iceberg (also called 1g
crisphead) Romaine or Cos 1g Butterhead (Boston, Bibb) 1g Green leaf <.5g Red leaf <.5g * All values are rounded to the nearest whole number.
Epidemiology of tomato spotted wilt virus disease on
crisphead lettuce in Hawaii.
Broadly they are split into those that form a distinct heart and those that do not: Butterhead, much favoured on the continent, Chinese lettuce (sometimes labelled as Chinese cabbage), mini lettuce varieties,
Crisphead or Iceberg types, leafy types and Cos or Romaine types.
Iceberg lettuce is actually a variety of
crisphead lettuce.
If you prefer a crunchier
crisphead type then go for Mini Green which has tight, tennis ball size heads.