Hydrangeas are pop deciduous flowering bush develop in many parts of the United States , including Minnesota , and there is a broad range of species and cultivar from which to opt .
When growing hydrangeas in Minnesota , it is important to select diverseness that are winter audacious in your part of the state . According to theArbor Day Foundation , Minnesota falls within U.S. Department of Agriculture plant hardiness zone 3 to 5 , with the northerly part of the state have got a cold climate than the southern regions .
This guide will take a smell at some of the different potpourri of cold - brave hydrangea , as well as ply helpful information on how to honest care for them to ensure their survival through the harsh winter season .
Types of Hydrangeas for Minnesota
If you survive in southern Minnesota , which falls in USDA zone 5 , you could consider maturate the popular bigleaf hydrangea ( Hydrangea macrophylla ) . The coloration of the bigleaf hydrangea ’s flowers is determined by the pH of the soil . The blooms will be blue in soil that is acidulous and pink in land that is alkaline .
The oakleaf hydrangea ( Hydrangea quercifolia ) is also an option in the southern parts of the state , though theMissouri Botanical Gardennotes that both of these mintage need winter protection in zona 5 .
If you are turn up in the northerly parts of the land , turn over growing the panicle hydrangea ( Hydrangea paniculata ) or the smooth hydrangea ( Hydrangea arborescens ) . Panicle and bland hydrangea produce snowy prime , but you ’ll find cultivars in other colors . Both of these species are fearless to zone 3 , according to theMissouri Botanical Garden , which makes them some of the hardiest hydrangea you ’ll bump . If you are look to engraft a vine , plant mounting hydrangea ( Hydrangea anomalasubsp.petriolaris ) , which are dauntless to zone 4 .
When Do Hydrangeas Bloom in Minnesota?
hydrangea are summer - blooming plant , with most species flower between July and September . However , in some face , bigleaf and oakleaf hydrangeas in dusty climates like that of Minnesota may not bloom at all in some long time as a result of wintertime temperatures .
Hydrangeas also favor to grow in part shade , and inflorescence may be reduce and the bloom period cut unretentive if the plants are exposed to too much sun . With tolerable moisture , however , hydrangea can do well in full sun .
Pruning Hydrangeas in Minnesota
Hydrangeas often ask to be dress to look their best . Some hydrangea , including the bigleaf and oakleaf hydrangeas , bloom on the former yr ’s Mrs. Henry Wood , called old wood . These species should be pruned right after they are complete flowering . If you prune after fresh buds are determine , you wo n’t have heyday the undermentioned natural spring . You should , however , prune out any arm that suffer wintertime injury .
Pruning hydrangeas in free fall is possible if you are growing species that flower on the current year ’s wood , referred to as young Mrs. Henry Wood . The smooth and panicle hydrangea are instance of species that flower on unexampled woods . They can be cut all the way down to the ground during the wintertime to rejuvenate the flora . The mounting hydrangea rarely requires pruning .
Hydrangea Minnesota Winter Care
Because they bring about bloom on old Grant Wood , if you are growing bigleaf or oakleaf hydrangea in Minnesota , you will desire to provide winter tending to verify that the shrub ’s blossom buds last until spring . TheMissouri Botanical Gardenrecommends wrapping hydrangea shrubs in burlap or skirt them with chicken conducting wire and filling the blank space with a bed of leave or straw 8 to 12 inches chummy .
It is also a good idea to grow your hydrangeas where they will be protected from harsh winter wind . TheUniversity of Minnesota Extensionalso advocate surrounding your hydrangea shrubs with ironware material or wire fence during the winter months to keep rabbits from munching on the offshoot .
