GrowingCarnations From Cuttings. Arrow Of Carnations That Propagate Fire. Carnation Plant Care Tips. How To GrowCarnations. Learn more about how to growcarnations and how to use them in fresh flower arrangements with tips from experts who are fans of this underrated plant. Carnations are often grown for their cut flowers, which are prized for their long-lasting beauty and fragrance. To harvest carnations, cut the stems just as the buds are starting to open. Carnations can be grown in small to medium pots or planters (at least 20cm wide and deep) with good drainage. Fill your pot or planter with Scotts Osmocote Premium Potting Mix. Read on to learn the ultimate guide on growingcarnations, particularly growingcarnations in pots, plus the best plant caring tips on carnations. Growingcarnations from seeds and cuttingsAnnual varieties of carnations are usually grown from seed in early spring or autumn.Cuttings of the perennial forms can be taken from non-flowering shoots in summer. Carnations are easy to grow from seed. Keep seeds moist and warm for optimal germination. Carnation seeds can be started indoors or directly sown in the ground after the last frost. Problems with GrowingCarnations. Carnation plants possess a toxin that affects dogs and cats, causing skin irritation or intestinal issues if parts of the plant or flower are ingested. The carnation (Dianthus caryophyllus) is a perennial grown widely for use as a cut flower. Who among us hasn't been gifted with a carnation flower corsage, boutonniere, or bouquet? Florists laud carnations for their staying power, and gardeners enjoy their aroma—a sweetness with hints of warm, earthy spice—and visual appeal.