2500 Potential Plantseasiest Crop To Growexcellent Catch Crop – Grow While Waiting For Slowing-growing Cropswatercress Aqua – So Easy To Grow & Perfect For Uk Conditionsproduces A Large Crop High In Calcium & Iron With A Delicous Peppery Flavour.seeds Can Be Sown From Mid-may To September & Can Be Harvested From June To October. Regular Picking Is Essential For Continuity. Use Watercress As An Effective Catch-crop. They Mature Quickly & Give You A Good Supply Of Leaves While You’re Waiting For Slower Growing Crops Like Leeks Or Cabbages.we Recommend You Sow Seeds Directly In Shade & Keep Moist. Alternatively Watercress Aqua Can Be Grown In Pots Placed In A Large Saucer Of Water.