Which perennials do well in pots?
Perennials that do well in pots are blueberries, citrus trees, something like a dwarf Girardi Mulberry (not a regular mulberry tree), azaleas, hydrangea, roses, hydrangea, etc. A lot can be grown in a pot but it is a question of how big of a pot you have. Some plants work well in pots all year round. These include hardy evergreen foliage plants like yucca, English ivy, variegated euonymus and heuchera, and flowering plants like Skimmia japonica and hebes.
Can I leave soil in pots over winter?
Protect your containers. These will need emptying when the temperature plunges, because they will often crack when frozen. Transfer the soil and any spent plants from these containers to a compost pile. Place dormant perennials in the ground or in another, frost proof pot. The answer: plant them in pots. Containers are also a great way to grow perennials that aren’t quite winter-hardy enough for in-ground cultivation in your region.
What is the longest flowering perennial plant?
Geranium. Probably one of the longest flowering garden plants, hardy geraniums start flowering around May, and continue to October, depending on the variety. One of the longest flowering varieties is Geranium ‘Johnson’s blue’ (illustrated) which is also attractive to bees. Some of the best include Geranium Rozanne, famous for its incredibly long flowering season, and Salvia Caradonna, which blooms early and often. Gaura Whirling Butterflies, Verbena bonariensis, Scabiosa Butterfly Blue and Nepeta Six Hills Giant also flower for much of the summer.