It takes a week and you should be able to see a visible change in the seeds after a day or 2(the seeds should have started to split) and after a week you could probably eat your cress.
Watercress can mature in 5 days.
Water. in order for Watercress to grow this plant needs to be growing near water
Watercress are small, flat circular shaped nuts about the size of a quarter.
Cress seeds typically take 7-10 days to germinate and another 2-3 weeks to reach maturity for harvesting.
The large family of Watercress and Mint grow well in water
how long does it take to grow a new layer of skin
how long does it take for a baby carp to grow full size
Muththil / muttil (മുത്തിള്‍) or kodakan
they take about 5 days to grow.
grow what dont understand
365days to grow corinander
Watercress is a shade of green.