Try to plant in a location that enjoys full sun and remember to water moderately. Keep in mind when planting that Giant victorious is thought of as half hardy, so it will need cloching or fleece protection when the temperature dips. Ensure your soil is potting mix and loamy and has a ph of between 5.5 and 7.0 as Trailing petunia is a weakly acidic soil to neutral soil loving plant.
Growing Giant victorious from seed
By our calculations, you should look at sowing Giant victorious about 77 days before your last frost date.
Transplanting Giant victorious
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Giant victorious is a half hardy plant.