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Petunias prefer full sun but can tolerate partial shade. On particularly hot and sunny days, you might consider moving them to a spot that gets less sun, if that is an option.
Petunias are generally insect pollinated, with the exception of P. exserta, which is a rare, red-flowered, hummingbird-pollinated species. Most petunias are diploid with 14 chromosomes and are interfertile with other petunia species, [ 9 ] [ 10 ] as well as with Calibrachoa .
The plants can tolerate light frost and thrive in sun or semi-shade. Plant in a free-draining soil and water only when the soil is almost dry. They can be propagated from tip cuttings, but are frequently grown as half-hardy annuals. They are suitable for container gardening and hanging baskets and will attract hummingbirds.
In their place, Vater suggests planting three to six ‘Wave Blue’ Petunias, which provide “trailing purple blooms until the first frost,” or hardy trailing dark purple verbena varieties ...
Petunia seeds germinate in 5 to 15 days. Petunias can tolerate relatively harsh conditions and hot climates. They need at least five hours of sunlight every day. They grow well in low humidity, moist soil. Young plants can be grown from seeds. Petunias should be watered once every two to five days. In drier regions, the plants should be watered ...
Indoor plants lifted your spirits during the colder months—but now, as the weather warms, it’s time to turn your attention to the exterior of your home. You...