No salad should not be without lettuce! If you want lettuces’ over the summer months then your lettuce seeds should be planted at fortnightly intervals between March and July; this will ensure that you have a continuous supply over summer.
If you want to have lettuces’ for the spring then you need to sow a lettuce seed variety which can stand through winter to head the following spring. These seeds need to be sown in September.
In general Lettuce seeds take between 10 and 14 weeks to reach maturity.