Measure the growth rateEvery 5 days.And when the lettuce There are 45 days old. Record growth for the first time when plants are 15 days old, and again every 5 days until the plants have over 45 days.
Measure the growth rate of each 5 days and harvested at the beginning of lettuce last 45 days. The first record of growth when the plants between 15 days and again every 5 days until the plant reaches the age of 45 days.