![]() Propagating petunias from stem cuttings is better because you can make sure it’ll keep its true black color. Here are some more useful tips for growing petunia plants from seeds: Wait until the seedlings become larger, and then repot them into a bigger nursery tray. In about 5-10 days, the seeds should germinate. Keep the substrate moist! Expose the seeds to light and keep them in warm temperatures. Don’t cover the seeds with the growing medium because they need light to germinate. Scatter a couple of seeds inside each cell. Once it dries out, cut the head and shake it inside the plastic bag or wrap to collect the seeds. Harvest the seeds by tying a plastic wrap or a plastic bag around the flower head in seed. You can follow the simple steps below to introduce more jet-black flowers to your garden: Propagating Petunia From Seeds There are two ways of propagating the black petunia plant, either from seeds or stem cuttings. ![]() You can apply a slow-release fertilizer twice a year (in early spring and early summer) and a diluted liquid fertilizer twice a month. However, slow-release fertilizers are usually used for outdoor plants, whereas liquid ones are generally applied to houseplants. It doesn’t really matter whether you use slow-release or liquid fertilizer for your petunias, as long as you use petunia feed or a variety with a balanced ratio of macronutrients (for instance, triple 8 or triple 10). Simply mix equal amounts of sand, peat moss, and shredded bark, and you’re done! Fertilizer If you want to show off your black petunias in new hanging baskets, you can make your own mix that isn’t as heavy as the store-bought blend. ![]() But you can always amend it with organic materials, such as homemade compost.įor potted plants, choose a good-quality potting mix that is loose, fertile, and well-draining. Native soil is not the best choice as it can be too heavy and compact, so the petunias’ roots won’t be able to spread. Petunias need well-draining, loose, and slightly acidic substrate. This variety is hardy down to 40☏, but it generally prefers warmer temperatures, so you should always try to keep it in temperatures between 65-75☏. The good news is that you don’t have to take extra steps to increase air moisture because the black petunia plant thrives in lower humidity levels. But if you don’t live in a region with enough rain, you can always use distilled water instead.Īlso, you should always wait until the topsoil begins to dry before irrigating your black petunias, or you risk overwatering and root rot.Īs this plant has shallow roots, you should water it slowly and wait until the excess moisture starts draining out through the drainage holes. Rainwater is good for plants and doesn’t cost anything, so you can use it to hydrate them. For instance, tap water contains too much chlorine and can disrupt the absorption of the moisture and minerals your plants need to survive. The first thing you need to do is choose the best water for your plants. Of course, growers that don’t have access to indirect sunlight can always use grow lights! Water Requirements If you decide to grow this plant indoors, you can place it near an east-facing window where it’ll get direct sunlight in the morning and bright light in the afternoon. However, too much light can quickly lead to sunburn, so ensure your plant gets some indirect light during the hottest times of the day. The black petunia plant thrives in full sun, so you should expose this plant to about six hours of direct sunlight each day. It’s simple tend to its basic needs from below, and your plant will thrive! Light Requirements But how do you keep the flowers black and the plant healthy? The black flowers of this petunia variety make it a desired cultivar among flower lovers. 4 Final Thoughts Black Magic Petunia Care Guide
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