For a balanced development, it is best to position the the Petunia in a place where it is exposed to at least a few hours of direct sunlight. Annual plants are usually not grown during the cold period; as autumn arrives we can uproot them and save the seeds for the year after.For a correct development of the plant we suggest avoiding exposure to late freezings; let's grow it in a covered place, locating it outside only in late spring.
Growing they develop a round-shape shrub. Petunia isn't an evergreen; during the spring, summer, autumn, winter it assumes a white colouring; the adult species are medium in size and reach 30 cm in height. The Petunia is a year or two year long plant.
When we prepare the soil to welcome our annuals, in the apring or at the beginning of the summer, letís add a good quantity of manure, or slow release granular fertilizer. To improve the flowering we can also give it specific fertilizations for flowering or green plants, mixed with the irrigating water, every 20-30 days.
We suggest watering these plants only from time to time, but we must remember to wet the soil deeply using 2-3 glasses of water every 1-2 weeks . As autumn comes these plants tend to perish, we can diminish the waterings, or even interrupt them.
The spring weather, with a high temperature swing between the day and night hours, and pretty frequent rains, can favour the development of fungus diseases, which should be treated pre-emptively with a systemic fungicide, to use before the gems grow excessively; at the end of the winter we also suggest a wide range insecticide to prevent the attack of aphids and cochineals. We should always remember to do these treatments when there aren't flowerings in the garden.
Letís grow these plants in a soft and dissolved, but well drained, soil.
Seeing the quite contained development itís possible to grow these plants in a container. The indications given in this article are related to a medium size plant.