Answer: Watercress is actually in the Nasturium family and does well in any wet, non acid soil in full sun. You can often establish it at the inlets or outlets of ponds, in eddies of clear streams or even under the drip line of a house. Start the seed indoors first in soilless potting medium and then transplant to the wet area. Sand is okay, but moisture is a must, so you'll need to be sure the soil stays wet through the spring and summer. Once growing, it will establish well and spread, if happy.
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