Petunia seeds require light for germination. "Wave" petunias are a common type of spreading petunia.
#Petunia seeds germination month full#
When grown in full sunlight, they are so covered by flowers that you hardly see any foliage. They're also amazing in hanging baskets and window boxes, where they trail two to three feet or more over the summer. This makes them ideal for scrambling down a hillside garden, or planting atop a retaining wall. Groundcover or "spreading" petunias are only about six inches tall, but spread so rapidly that they cover a huge area over one growing season, provided they're watered and fertilized frequently. They make good edging plants and are also attractive when mixed with other flowering annuals in containers, where they may be viewed close-up. Milliflora petunias are compact, miniature plants that produce abundant quantities of perfect, small flowers only an inch to an inch and a half in diameter. Typically, they're massed together to create big splashes of color in the garden. Like grandiflora varieties, they're available in single or double forms, though the vast majority are singles. Their flowers are smaller than the grandifloras, but they make up for it with the sheer number of blossoms that are open at any given time. Multiflora petunias are often more compact. Some have a pendulous, cascading habit that makes them more suitable for hanging baskets and window boxes, but most are upright plants that develop over the summer into large mounds of flowers which are 12 to 15 inches tall. Grandiflora petunias, the most popular type, produce large flowers that are three to four or more inches across. Many varieties will thrive even if the soil is not rich and have undemanding requirements for watering.
The most important requirement for growing petunias successfully is a location with plenty of light. Whether you like the old-fashioned types or the fancier, new varieties, there truly is something for everyone when it comes to petunias. Some petunias are more suited to container growing, while others are better for massing in the garden. They fall into distinct categories, based on flower size and growth habit. There are literally hundreds of named petunia varieties. Petunias are bright and lively, bloom from spring until frost, and scent the air with lovely fragrance.īest of all, petunias are amazingly easy to grow, both in the garden and in containers. Accustom young plants to outdoors (avoid frost), before planting out 25cm(10in) apart, once frosts end.Petunias are among the most popular flowering annuals for good reason. Grow on in cooler, but not cold conditions. Transplant seedlings 5cm(2in) when large enough to handle. Cover tray with clingfilm to preserve humidity, but remove when seedlings appear, usually in 14-21 days. Sow thinly on surface of a tray of pre-watered compost. Sow indoors, a warm kitchen windowsill is ideal. Grandiflora– the largest and showy blooms, best in containers to protect the flowers.
Multiflora – very versatile and weather tolerant for all types of display. It has been the subject of an enormous amount of breeding work in the last 50 years, and it is no wonder so many of us love to grow this dazzler. One of our most popular and widely grown summer bedding and container plants, the petunia enjoys full sun and dry weather, where it will reward us with masses of jewel-like blooms in a wonderful assortment of colours.
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