Parsley can still be sown successfully in late summer, but the strength of the midday sun at this time of year makes shade far more important than it was earlier in the season. A shadier spot helps the young seedlings develop steadily, rather than bolting into flower before they have produced much worth picking.
Choosing the right spot for a late sowing
Look for a position that gets gentle morning light but sits in shadow for the hottest part of the day, whether that is the shaded side of a balcony or a spot tucked beneath taller pots. This kind of dappled protection suits parsley particularly well at this point in the season.
Sow the seed thinly into loose, moisture-retentive compost, covering it only lightly, since parsley germinates slowly at the best of times and needs consistent conditions to get going. Uneven watering during germination is one of the most common reasons a late sowing fails to establish.
Keep the soil evenly moist while the seedlings emerge, checking it daily if the weather is still warm, since drying out even briefly can set young parsley back considerably. A light watering can with a fine rose is far gentler on the delicate new roots than a heavy stream.
Thin the seedlings once they have a couple of true leaves, so the remaining plants have enough room to develop a proper root system before growth slows for the year. Crowded seedlings compete for both light and moisture, weakening the whole batch.
Consider using a taller neighbouring plant to cast a little extra shade over the seed tray during the warmest part of the day, rather than relying on the position alone. This natural screening often makes just enough difference for a late sowing to establish without additional fuss.
With a shadier spot and steady watering, a late sowing of parsley can still provide a useful supply of tender leaves well into the autumn months. It is a straightforward way to make the most of the kitchen garden once the hottest days have started to fade.
