If you are placing your petunias under grow lights, be sure the lights are 4 to 6 inches above the containers. Place containers in indirect sunlight for at least 6 hours a day. If you have a heat mate, this will be beneficial to keep temperatures high during germination. We want temperatures during germination to be around 75 F to 85 F. This will help keep temperatures high so seeds can germinate. Once watered and labeled, cover the seeds with a plastic dome or plastic wrap. Label each container, so you know the variety of each container. Misting the soil works best because pouring water over the seeds can cause them to shift. Once the seeds are planted, lightly water until the soil is moist. They should be just below the soil surface. Once they are filled, lightly press the seeds into the soil. Begin by filling pots or cells with potting soil. You should start planting seeds 10 to 12 weeks before the anticipated last frost of the spring. Once you have gathered your materials, you can begin to plant your seeds. Step 3: Planting Seeds Start planting your petunia seeds by filling pots or cells with potting soil. If you are growing a few plants by seed, you can place them in your home’s windows for proper lighting. A growing light system or greenhouse is ideal for large amounts of seedlings. They need large amounts of light when beginning to grow. You will need to gather potting soil, pots, cells or trays, water, seeds, and labels. This will help you determine how much of each material you will need. You need the proper materials to ensure you have successful germination.īegin by identifying the number of petunia plants you want to achieve. Starting petunias by seed is rewarding but also takes time and money. Step 2: Gather Materials for Planting Prepare your gardening materials before you attempt to grow petunias from seed.īefore you begin planting, you will want to gather the necessary materials. The coating on the pellet will dissolve over time. Pelleted petunias are easier to see and handle during planting. The seeds are very, very tiny and can be difficult to handle. Mounding varieties look great when planted in masses and blanket areas very nicely.Īnother thing to consider is you can find seeds in pelleted and non-pelleted form. They don’t spread like trailing varieties and stay in a nice compact mound for their life cycle. Mound varieties are excellent choices in flower beds, containers, landscapes, and vegetable gardens. You can keep trailing varieties shorter by pruning during the season. These petunias will cascade down the sides of the container, rock walls, or even trail up a trellis. As an added bonus, they are self-cleaning. Trailing varieties are great in hanging baskets and containers. You will first have to decide if you want a mounding variety or trailing variety. There are hundreds of varieties to choose from, and this can be overwhelming, especially for new gardeners. The hardest part of growing petunias is choosing a variety to grow. Step 1: Choose Your Variety There are many different types of petunias to choose from. If given these few conditions, they will reward you with their beautiful blooms all season long. They love full-sun, and they need well-draining soils. Even though there are five different categories, they do have a few things in common. The five different petunia categories are grandiflora, multiflora, milliflora, flordibunda, and trailing or spreading varieties. There are five categories of petunias, and each one has a unique quality about them. Petunias bloom from spring to the late fall. They are tender perennials but are more commonly grown as an annual in cooler regions. They provide floods of blooms even on the hottest days. Follow the simple instructions outlined in this article to get started! First, a Bit About Petunias Petunias produce stunning blooms throughout the season if provided the right growth conditions. If you need to plant a large number, are looking for a specific variety, or you simply love growing something from start to finish, consider growing petunias by seed. If you are after a specific variety that is less popular or garden centers don’t carry, planting by seed is your best option. Garden centers and nurseries only carry so many petunia varieties in containers.
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