When the hot summer months roll around, many gardeners must say goodbye to their tender spring flowers, which start to fade as soon as temperatures increase. Though many plants will droop and wilt in the summer heat, there are plenty of others that continue producing healthy foliage and blooms during the season.
A member of the daisy/aster family, butter daisy (Melampodium divaricatum) is a summer blooming annual native to the Southwestern United States and the tropics of Central and South America. The shrubby plant boasts broad, bright green leaves accented by cheery solid yellow daisy flowers. Butter daisy can be grown in a container, or left to its own devices in the yard.
The plant does best in USDA zones 5 to 10, in full sunlight. The tender annual cannot handle frost--proper sunlight is essential to its health. An average well-draining soil will suit the plant fine. Butter daisy is moderately drought tolerant once established and requires little attention.
European meadowsweet is an herbaceous perennial that sports silvery green and yellow variegated leaves and tiny white blooms, which appear in mid to late summer. The plant has a stiff, erect habit and wont spread past its designated space. European meadowsweet does best in USDA zones 3A to 9A in partial sunlight. A neutral, well-drained loam is ideal, as is frequent watering.
Meadowsweet thrives with heavy watering and will tolerate water-logged soils. The plant works well as in an herbaceous border or as a stand alone specimen plant. European meadowsweet's fragrant flowers can be cut for fresh or dried flower bouquets.
Siberian iris (Iris sibirica) is a perennial wetlands plant that boasts lush blue green foliage and silky flowers in colors ranging from blue to purple or white depending on the cultivar. The plant produces its lavish blooms throughout the summer. The plant is ideal for those who are looking to add a little color near a pond or another area with water-logged soil. Siberian iris will grow in USDA zones 4A to 9A, in partial sunlight or full sunlight.
A neutral or acidic well-drained loam is perfect for this plant, although the real key to its well-being is frequent watering. Siberian iris makes a great cut flower thanks to its attractive foliage and stiff stem.