|what is the easist flowering plant for long duration|
|A couple of long blooming, easy care perennials are:
Centranthus (Red Valerian) Bloom Span: 3-4 Months. Centranthus prefers dry, lean soil. In intense heat it will bloom in spring and again as it feels up to it, throughout the summer. The plants don't live longer than about 5 years and they resent being divided or relocated. A good choice is Centranthus ruber 'Albus'.
Coreopsis (Tickseed) Bloom Span: 3+ Months. Coreopsis are undemanding plants, but short lived. Either allow them to self-seed or divide the plants every 2-3 years and replant the newer, outer sections. Flower buds form all along the stems. Once the initial buds have completed blooming, sheer the plants back by 1/3 to encourage new flower buds. Good choices include Coreopsis verticillata 'Zagreb', C.v. 'Golden Showers', C. grandiflora 'Early Sunrise'.