Cultivation

Open-field cultivation — Petunia × hybrida

Petunia x hybrida hort. ex E. Vilm.

When growing Petunia × hybrida in the open field, success depends on the choice of cultivar group: large-flowered varieties are most sensitive to precipitation, whereas multiflora varieties are more resistant to adverse weather.

In the reference 5 varieties crop Garden petunia, where this is mentioned in the description.

Selecting a site for Petunia × hybrida in the open field requires consideration of the specific group's reaction to external factors. Grandiflora varieties require protection from wind and rain due to the vulnerability of their large flowers, which are prone to rotting. Multiflora varieties are more adaptive to precipitation and cold spells, but require protection from wind due to the brittleness of their shoots, while trailing (ampelous) forms are critically dependent on intense lighting for the development of full flowering.

Plants require areas with full sun exposure for at least 6–8 hours a day in well-drained soils. Planting in the middle latitudes is carried out after May 15, as despite the ability of some F1 hybrids to withstand short-term frosts down to -4°C, this significantly delays adaptation. Maintenance includes regular removal of withered inflorescences to maintain aesthetic appeal and pruning of elongated shoots to stimulate branching, as well as ensuring proper ventilation of plantings to prevent fungal diseases.

General information about the subject — on the page Open field.

Sources8

Varieties of Garden petunia mentioned in the description

Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.