Geranium×johnsonii‘Johnson ’s Blue ’ , the Meadow Cranesbill Johnson ’s Blue , or more simply Geranium ‘ Johnson ’s Blue ’ is a clump form hardy geranium with lavender , 5 petalled flowers , roughly 5 com ( 2 inches ) across which held above attractive foliage . The plant detention ’s theRHS Award of Garden Merit .
The stalwart geranium are great background cover plants , given their spread habit and their margin of fond shade . Geranium Johnson ’s Blue is always a great garden selection because it typically blossom extravagantly over a long period in early and mid - summer and has one of the most striking blossom colours among the blue Geraniums , as well as a overnice reddening of its foliage in fall / fall .
Plant Notes
Family
Geraniaceae .
Plant Type
Deciduous herbaceousperennial .
Soil Type
Will turn any most soil types with restrained prolificacy , except if waterlogged .
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Aspect
demand full sun or fond shade .
Eventual Size
Height : 30 to 60 cm ( 1 to 2 feet ) .
Spread : 60 to90 atomic number 96 ( 2 to 3 foot ) .
hardiness
Fully hardy to at least -20 Celsius ( -4F )
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Plant Calendar: Geranium Johnson’s Blue
Sow sow : Feb , March , April
Plant Out : May , June , July , Aug
Flowers : May , June July , Aug.
Garden Uses: Geranium Johnson’s Blue
you may use Geranium Johnson ’s Blue in all sorts of planting schemes . It work very well as an underplanting toshrubsor small trees and can also be grown in mickle or container , produce layer or other terrace - type planting .
To my mind , however , the good use of hardy geraniums ( let in Johnson ’s Blue ) is at the front of cryptical border , with marvellous perennial industrial plant , such asThalictrums , behind .
Caring for Geranium Johnson’s Blue
Hardygeraniumsprefer moderately fertile soil , so will not need much feeding expect in very depleted or very sandy grime . Keep reasonably well water in the grow season , but do n’t allow the works to become waterlogged .
These are plants that go around through their underground rootstock – which is outstanding because they provide more ground cover , but also makes it middling easy to pass around the works .
multiplication can be done by segmentation – which means digging up the industrial plant and dividing the clump into two , three or four sections , depending upon how big the thumping is . You may be capable to draw the clump aside , otherwise I usually use a sharp kitchen tongue for separate perennials of this type . Divide yourplants in early fountain .
you could also pass around by taking basal cutting off in mid - fountain . This means edit off new shoot at their substructure and root in a kitty with a needlelike / gritty compost intermixture .
It is always a proficient idea to trim back back thespent flowersand older foliage after hardy geraniums have first flowered as this will encourage reinvigorated growth and possibly a second flush of flowers .
Hardy geraniums can endure from powdery mildew and side attack by capsid bugs . sustain the plants healthy with sufficient piddle and a right mulch can help with resisting approach .
Martin Cole has been an zealous works lover and nurseryman for more than 20 years and screw to speak and pen about gardening . In 2006 he was a finalist in the BBC Gardener of the Year contention . He is a member of the National dahlia Society .
He previously last in London and Sydney , Australia , where he drive a sheepskin course in Horticultural studies and is now base in North Berwick in Scotland . He founded GardeningStepbyStep.com in 2012 . The site is aimed at everybody who be intimate plants or has been bitten by the horticulture hemipterous insect and wants to make out more .
Gardening Step by Step has beencited by Thompson and Morgan , the UK ’s large mail order industrial plant retailer , as a website that print technical horticulture content .
