When searching for plants for a northern climate garden, the key thing to look for is frost tolerance. This will ensure that your plants continue to bloom each year without any special treatment in the winter. Some plants even thrive in the winter.
Helleborus odorus or Double Queen flowers bloom mid-winter. The Veronica longifolia or Sunny Border Blue is a great plant with spiky blue flowers that bloom late into the season. The best thing to do would be to visit your local library or bookstore and flip through pictures of the various perinneals in order to come up with a color and growth scheme that pleases your eye.
You can also visit the website I have referenced below for some guidance.
Many flowers will self seed to return the next season in frosting climes. Poppies, larkspurs, merrigolds, lupine, wild iris, some lillie - you could grow medicinal which require frosting winters in order to grow well: goldenseal, echinacea (many beautiful varieties),honeysuckle(vine and shrub) osha, american ginsing, garlic,comfrey, rhubarb, burdock. Juniper, ceder, flatleave ceder, these are enduring.
Of course virtually all the berries we all know and love require a cold winter and many make dense hedge or foliage features in landscaping. Wild strawberries make nice ground cover and ask very little. Huckleberries have no thorns.
Asparagus takes a while to get rolling but loves cool soil, endures deep winters, produces beautiful wisping greenery, and once established makes vital food. Mahalo.
Perennials are those flowers which reliably bloom year after year. They die back to the ground each winter after flourishing for a full growing season only to reemerge again in the spring. They're also noted for their texture and vibrant colors.
Generally, perennials are a bit maintenance though there are those require almost no maintenance. These perennials are some the easiest to care for. They also provide colorful flowers and long lasting foliage.
Daylilies are a very common perennial which do remarkably well with very little maintenance. Their flowers, which are available in a wide range of colors, bloom on stocks which grow up from clumps of long pointed foliage. A profuse bloomer, daylilies flower for weeks.
They prefer a bit of shade in the afternoon when the sun is strongest. Easy Care Perennials - perennial-gardens.com/flower-articles/ea....
Perennial plants are one of the good plants for landscaping because it can live 1- 2 years and so I suggest to put some perennial vegetable and fruits.
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