Nasturtium officinale. True Watercress seeds produce a perennial cress that is rich in vitamins and has a delicious, distinctive taste for salads and vegetarian dishes. Little, dark-green leaves grow on crisp stems that come from thick, long roots. Direct-seed watercress about 5mm deep and 1cm apart, ideally in full sun near clear running water. Thin plants to 10cm and keep very well watered. Watercress does not thrive in acidic soil, so spread enough lime in the growing area to bring the pH as close to 7.0 as possible. Well finished compost is the other trick that will keep watercress growing rapidly. If you fail with watercress in your summer garden, try planting it beneath a cloche row cover for winter harvesting. The low light levels and cool temperatures seem to be ideal.
How To Grow, Timing: Seed every three weeks from just before the last frost date until the end of summer for a continuous harvest. Provide frost protection with a cloche or heavy row cover when frost looms in the fall. Many mesclun types and mixes will continue to grow all winter where winters are mild.
How To Grow, Starting: Plant in a block or in a wide row. Sprinkle the seeds evenly over prepared, moist soil. Try to space seeds about 1cm apart. Cover lightly with soil, and firm them in. Four grams of seed will plant a 12m row that is 7cm wide, so don’t plant the whole packet at once. For container growing, choose containers that are at least 10cm deep. Wider is better. The most common mistake is over-planting.
How To Grow, Growing: Ideal pH: 7.0 Moderately fertile soil – particularly if you’re planning multiple harvests. Dig in 1 cup of complete organic fertilizer for every 3m of row. For containers, use peat or coir based mix with compost added. Water regularly. If growth slows after harvest, use a bit of kelp or fish based fertilizer to provide a boost of nutrition for the next growth spurt.
How To Grow, Harvest: There are two methods of gathering salad greens. You can use scissors to cut everything about 2-5cm from the ground, when the plants are about 10-15cm tall. Or, you can pick individual leaves as they’re needed. The first cutting may contain more brassicas than lettuces (arugula, mizuna) but if you cut the mix back when the leaves are still small, the lettuce will catch up. The salad greens will regrow for a second harvest in another 2 or 3 weeks.
Matures in 60 days.
Approx: 990 Seeds
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