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They can be grown in garden beds, pots or hanging baskets providing they receive plenty of sun. When planting them in the garden dig through plenty of 5 IN 1 Organic Fertiliser to enrich the soil. If growing petunias in containers it’s important that the potting mix you use is of good quality. For the best results use Searles Premium Potting Mix. Make sure the soil is kept moist when the plants are young.
Advantages growers will find in the Summer Doubles series include earliness, uniformity, heat and weather tolerance and a superb presentation. Compact plants flower profusely and early, presenting excellent coverage in a 4-inch pots and in baskets. The series is uniform across three colors — Pink, Rose and White. While double petunias are typically later than single-flowered, Surfinia Summer Doubles are the earliest to bloom in the double petunia category. Petunia species are mostly annual herbs. The leaves are sessile (e.g., lacking a petiole, or leaf stem) and are usually oval-shaped with smooth margins; some feature fine sticky hairs. The flowers are funnel-shaped, consisting of five fused or partially fused petals and five green sepals. Most species are insect-pollinated, though P. exserta is pollinated by hummingbirds. The minute seeds are borne in a dry capsule. Molecular evidence has led to the reclassification of some former Petunia species into the closely related genus Calibrachoa, known for the ornamental plant called “
Although technically a perennial, the common garden petunia is most often grown as an annual; its flowers bloom profusely from early summer until frost. The plant grows well in temperate climates and does not tolerate shade. The innumerable horticultural varieties fall into two general types: the compact erect type, reaching 15–25 cm (6–10 inches) and adapted for summer garden beds, and the sprawling long-stemmed balcony petunia, which grows to about 46 cm (18 inches) and is often potted in hanging baskets and window boxes. The flowers range from pure white to deep crimson or purple and are often speckled or veined in contrasting colours. There are single- and double-bloom varieties.Whenever feasible, it's a good idea to remove faded flowers, including the portion below each flower where seeds will develop. This practice, called "deadheading," encourages blooming by preventing seed formation. Although it may not be practical to deadhead masses of petunias in the garden, it's a must for flowering annuals in containers. Deadheading not only helps prolong blooming, it also keeps plants looking fresh, healthy and well-groomed. (Source: extension.umn.edu)