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Learn how to grow dianthus from seed indoors and plant it out in the garden for beautiful blooms all season long!
Start seeds indoors
Plan to start your dianthus seeds in late winter or early spring, 6-10 weeks before your last frost date.
Prepare the soil
Use a good quality seed starting mix, not potting soil. Mix it with water until it holds its shape when you squeeze it in your hand without any drips.
Plant the seeds
Drop one or two seeds in each hole. Since my seedling trays have pretty big cells, I make two holes on opposite corners and drop in one seed per hole.
After planting your seeds, place the tray under grow lights or a bright location such as a greenhouse or cold frame where it will get full sun.
They will take 7-14 days to germinate, so keep the soil moist even if you don't see growth yet.
Use a moisture dome
Cover the tray with a humidity dome to retain moisture, but remove it as soon as you start to see your new plants emerge.
After your dianthus seedlings are hardened off, they can be planted out in the landscape. The surrounding soil will keep the roots protected from a light frost, and the cooler temperatures will encourage flowering later in the growing season.
For more tips for growing Dianthus from seed click the link below!