Sow outdoor March to July. To grow large crops it is best to grow parsley outdoors. Choose a sunny or partially shaded, sheltered location and wait until the soil has warmed up, ideally to around 10°C+. Then sow thinly directly where plants are to grow. Make a shallow trench 1.5cm deep and cover the seeds with fine soil. Sowing in rows 20cm apart will make it easier to identify and remove any weeds that may appear. Keep the soil moist and weed free. Thin out the rows by harvesting the weaker seedlings first, leaving plants to grow on at a final spacing of around 20cm apart. Repeat sowings will ensure a continuous supply throughout the summer. To extend the growing season, early and late sowings are best made under cloches. Once established, a regular liquid feed will help maximise crops.