After consulting with our top three landscape designers, we all agreed that the following six three hardy shrubs are low maintenance, disease resistance, and yes, they all bloom for over two months year after year. These plants are all hardy for planting zone 6, and they brighten any landscape.
Knock Out Rose In the year 2000, The Knock Out Rose revolutionized the way we think of roses because they require practically no maintenance and have profuse, stunning pink, red, or yellow flowers that normally go through three long blooming cycles every summer. If un pruned, the Knock Out can easily grow to be more than 4′ wide and 4′ tall, although if you want, you may cut them down to the size you want anytime after their first year, and you can keep them more compact. Knock Out roses make a perfect Mother’s Day gift because they are stunning to look at indoors in full bloom with a bow and foil around their 1 gallon containers. They may be planted outdoors anytime where they get at least 5 hours of full sun every day.
Endless Summer Hydrangea Since their introduction to our garden center in 2003, we have found that the Endless Summer hydrangea greatly outperforms the old-fashioned macrophylia. The repeat blooms of this hydrangea in blue, pink, white or lime green, truly offer an endless summer of amazing color. Use this hydrangea as a foundation planting, in a container, or part of a cut flower arrangement. This full sun or partial shade plant requires no pruning, and will grow to 4′ wide and 4′ tall. If you do choose to prune an Endless Summer Hydrangea to keep it compact, do it in the spring when there is new growth from the base of the plant. Once new growth has started to form, cut back the old growth to about an inch above the new wood.
Doublefile Viburnum Doublefile Viburnum is one of the most versatile plants we know. It can be planted in partly shaded areas and it typically matures to 8′ tall and 10′ wide. Its long spreading branches are lined with gorgeous white lacecap flowers which bloom for at least two months and give way in late summer to clusters of beautiful red berries. The ovate, dark green leaves of the doublefile viburnum turn an attractive reddish purple in fall. You can’t go wrong! The viburnum is a showstopper for three seasons can be planted in partial shade and require virtually no maintenance!