The Best Flowers to Plant in Idaho: 20 Flowers for a Gorgeous Bloom

10. Sweet William 

Over lance-shaped, green foliage, Sweet William develops bunches of little flowers on a flat crown. Flower colors may vary from magenta or white to stunning red tones, and numerous bicolor varieties are also available. 

Sweet William can reach heights of one to two feet and a one-foot spread. It favors organic soil with good drainage. This gorgeous flower prefers full light in the morning and afternoon with a bit of shade.  

USDA plant hardiness zones three through nine are ideal for it to thrive.

11. Pincushion Flower

Pincushion flowers are clustering perennials that reach heights of roughly two feet tall! It blooms with lavender-blue, two to three-inch diameter flowers. Blooms include ruffled petals, a unique center, and stamens that mimic needles in a cushion, giving them a daisy-like appearance. 

The blossoms placed on individual stems atop the plant contrast attractively with the lance-shaped gray-green leaves. It enjoys full sunlight and acidic, well-draining soil. Early spring through the summertime is when it blooms. 

USDA plant hardiness zones three through seven support its growth.

12. Petunias

Petunias are wonderful annual flowers that may blossom in Idaho until the beginning of November, but they truly flourish in the heat. You’ll see that there are more flowers as the temperature rises! 

If you’re looking for something low-maintenance, consider wave petunias! They don’t need deadheading to produce new blooms. They can grow everywhere in your garden, as well as in window boxes, hanging baskets, and other creative places.