Cress Growing Season
While each variety of cress may differ slightly in time to maturity and growing conditions, the following generally applies to all cress varieties.
Cress is a cold-weather herb and should be planted in early spring, two weeks prior to the last frost of the season and replanted until mid-summer. Cress can be sown again in early fall for a winter harvest. Cress grows best in shaded areas that get little to no direct sunlight each day. Cress seeds should be planted 1/4 inch deep into the soil, in rows spaced 18 to 24 inches apart. Cress does best in soil with a pH between 6.0 and 6.8.
On average, it takes between 40 and 70 days for cress to reach maturity (depending on variety); however, you can start harvesting 15 to 20 days after sowing the seeds.