Petunia Sunshine - Petunia Grandiflora is a traditional summer bedding favorite, and this yellow variety is one you will definitely want to add to your flower garden. Petunia Grandiflora yellow flowers easily establish from flower seeds, and they have large, color-drenched blooms that bloom early and heavily all summer long. Yellow Petunias also have a uniform, compact growth habit making them an ideal combination of beautiful blooms and wonderful foliage. Petunias are both reliable and colorful making them a favorite of gardeners! Petunia flower care includes: deadheading faded flowers for best display and to keep it full of color all season long and fertilizing regularly with a balanced liquid fertilizer. Season: Annual USDA Zones: 3 - 8 Bloom Season: Late spring through fall Bloom Color: Yellow Environment: Full sun to partial shade