Petunias – Need early indoor planting to bloom in spring.
Marigolds – Thrive when started indoors before the last frost.
Zinnias – Fast-growing but benefit from an early start.
Lavender – Requires extra time to germinate and establish.
Snapdragons – Bloom earlier if started indoors.
Pansies – Hardy flowers that prefer cool temperatures.
Sunflowers – Early planting leads to taller, stronger blooms.