Growing Watercress: A Complete Profile
By Growing Home Greens Team · August 10, 2026
Watercress is the plant upland cress is compared against and named for, a peppery salad green that shares its flavor but is harder to grow, since it needs constantly saturated soil rather than an ordinary garden bed.
It wants water, not just moist soil
Direct-seeding is difficult because of watercress’s high moisture requirements: seed sown about a half inch apart, a quarter inch deep, needs to stay wet to germinate at all, or you can start it indoors instead and keep the starting mix consistently moist. Either way, plants eventually want fertile, humus-rich, well-limed soil around pH 7.0 that never dries out. A pot standing in a saucer of water, with the water refreshed every couple of days, or a spot next to an existing water feature does the job better than a normal row in a vegetable bed.
A genuine perennial, hardy through winter
Unlike most of the greens in this dataset, watercress is a true perennial and hardy enough to keep harvesting through winter. Flavor is at its best in cool weather and fades once the plant flowers, so treat a bolting plant as past its prime rather than trying to coax more leaves from it.
Cut it back rather than pulling it
Harvest by cutting plants back to about 4 inches tall, then let them regrow for a second flush, the same cut-and-come-again approach used for many salad greens. Transplants started indoors about 3 weeks before the frost-free date can go outside, spaced 8 inches apart, once the last frost has passed.
Watercress has no recorded companions or antagonists in our data. See the full companion guide for watercress for how it’s tracked. In the Garden Designer, plan for it near a water feature or in its own constantly-watered container rather than a standard bed.
Sources: Cress: Watercress & Upland Cress: Key Growing Information, Johnny’s Selected Seeds; How to Grow Watercress in Your Garden, Utah State University Extension.
Companion planting guide for Watercress · Find your planting dates
Typically viable in USDA zones 3-10. Not sure your zone? Look it up by ZIP code.
Method: Either: Start indoors for an earlier harvest, or direct-sow outside for less fuss. Watercress tolerates either.
See exact start-indoors, direct-sow, and harvest dates for your zone →
How many Watercress plants fit per square foot?
Spacing: 9 per square foot (square-foot-gardening spacing). Mature height: 4-10 in.
Varieties worth considering
- Watercress: Johnny's Selected Seeds describes their straight-species watercress as a gourmet salad and sandwich vegetable with exceptional nutritional value, sold alongside upland cress on the same product page. (source)
Cited from the source shown next to each variety. We haven't grown these ourselves yet, so treat this as a research-backed starting point, not a personal endorsement.
Where to buy watercress seeds
As an Amazon Associate we earn from qualifying purchases. Some links on this page also go to other retailers we may earn a commission from as an affiliate, at no extra cost to you. We only recommend products with a genuine consensus of positive, independent reviews. See the sources cited on each item.
See it growing
Search YouTube for "growing watercress" videos → (a live search, not a hand-picked video; results vary and aren't vetted by us)
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Growing Watercress: The plant upland cress is compared against and named for, harder to grow since it wants constantly saturated soil rather than an ordinary garden bed.
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