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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 ...
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.
Petunia violacea Lindl. has been reported to be used as a hallucinogen in Ecuador, where the plant has the vernacular name shanín.The drug is said to cause sensations of levitation and flight – a type of hallucination often associated with the use of the more toxic hallucinogenic plants of the deliriant type; e.g., the tropane-containing Atropa and Hyoscyamus, active constituents of the ...
It takes just a few minutes a few times per week for gorgeous petunia blooms.
But grow lights or even simple LED strip lights are great options, too, if you don’t have a ton of windows. Also, avoid placing any plant in front of drafty windows or heating vents, says Hancock.
Ruellia simplex is an evergreen perennial growing 3 ft (0.91 m) tall, forming colonies of stalks with lance-shaped leaves that are 6 to 12 in (15 to 30 cm) long and .5 to .75 in (1.3 to 1.9 cm) wide. The flowers are metallic blue to purple, trumpet-shaped with an about 2 in (5.1 cm)-wide, five-lobed corolla. There is a dwarf variety that is ...
Ruellia caroliniensis is a herbaceous perennial with purple or pinkish flowers that vary in shade. [3] The plants grow to be up to 3 feet tall and have crowded, opposite, lanceolate to elliptic leaves. [3]
Petunia exserta is a rare member of the genus Petunia, endemic to the Serras de Sudeste in southern Brazil.First described in 1987, only fourteen plants were found in the wild during an expedition in 2007. [1]