stout geraniums are the most democratic perennials in Britain . And it ’s well-fixed to see why . They ’re tough and wanton to grow , many flowering for calendar month at a reaching .
What ’s the divergence between a geranium and a pelagonium ? Most people call pelargoniums “ geranium . ” But Geranium is actually a unlike flora genus . To help forefend confusion some refer to Geranium as ‘ hardy geranium ’ , and Pelargonium as ‘ tender geraniums ’ . These 10 unfearing geraniums have won the RHS Award of Garden Merit ( AGM ) . They are perfect for your garden .
When it come up to hardy geraniums , two of the most popular varieties are ‘ Johnson ’s Blue ’ and ‘ Rozanne ’ . Both offer stunning purple - puritanical blooms and well-to-do care but there are some key differences between these two works that are deserving considering when make your choice .
An Overview of ‘Johnson’s Blue’ and ‘Rozanne’
‘ Johnson ’s Blue ’ is a Graeco-Roman cottage garden plant , valued for its prolific florescence in early summertime . First introduced in the 1940s , it forms a summary mound to around 12 - 18 inches tall and wide , with cup - shaped flowers in a fertile violet - blue tone with blanched centers .
‘ Rozanne ’ is a new variety , introduced in 2000 . It is tall , reaching 18 - 24 inches tall and all-encompassing . The peak are a alike violet - gentle but have a more open kind with ruffled petals . ‘ Rozanne ’ flower for an exceptionally long period , from other summer until first hoarfrost .
Both are exceptionally hardy , coping well in zones 4 - 8 and requiring minimum care once established . They opt full sun to part shadowiness and fair , well - drained soil .
Flowering Time and Abundance
One of the openhanded difference between these two geraniums is their flowering execution over the season .
‘ Johnson ’s dismal ’ blooms vigorously for 3 - 4 weeks in early summer . Flowering originate in early June peaks in mid June with abundant blooms and twist down in early July . The flowers are produced in clusters , completely coating the leafage in rich colour .
‘ Rozanne ’ has a much longer flowering windowpane from former summertime to fall However , it does not flower with the same intensiveness as ‘ Johnson ’s Blue ’ at peak bloom . The flowers are produced steadily but not abundantly Often just single blooms come along sporadically amongst the foliage from July through October .
So while ‘ Rozanne ’ offer months of vividness , ‘ Johnson ’s Blue ’ makes more of an impact at its peak bloom clip . If you ’re looking for a sheer flowered video display for 3 - 4 week in early summer , ‘ Johnson ’s Blue ’ is the good selection . For continued color all time of year long , opt for ‘ Rozanne ’ .
Growth Habit and Foliage
In damage of their growth habit , ‘ Rozanne ’ is taller and more sprawling than the covenant , mound ‘ Johnson ’s Blue ’ .
‘ Johnson ’s grim ’ constitute a hefty clump at around 18 in improbable and broad . Its leaves are medium green and lightly textured .
‘ Rozanne ’ can reach 24 inches improbable and 36 inches wide . It has a more open , spread habit and big leaves with bolder veining and a tenuous pea green marbling .
The lower , spreading growth of ‘ Rozanne ’ gives it a floppy leaning , so it do good from cut back after flowering to better its shape . ‘ Johnson ’s Blue ’ holds its form well all season .
Hardiness and Care Requirements
Both ‘ Johnson ’s Blue ’ and ‘ Rozanne ’ are very hardy and well-fixed forethought in the garden . They have interchangeable needs :
‘ Rozanne ’ appreciate a bit more sunshine to blossom her best . ‘ Johnson ’s Blue ’ is a small more nicety large-minded .
Over time , both may become prostrate to fungal leaf spots . near airflow and pruning helps keep this . Overall , they are unfussy , toughened plant . ‘ Johnson ’s Blue ’ is a slimly easier charge miscellany .
Uses in the Garden
These geraniums have dissimilar habit , so they work well for unlike garden uses :
‘ Johnson ’s Blue ’ is idealistic for the front of borders , inch paths and walkway , and containers . It forms a perfect compact car , mound build .
‘ Rozanne ’ can be used in moulding but shinny shed over walls , twig down slopes , and softening stride and retaining walls with its spreading form .
In Summary
When chosen for their unlike strength , both ‘ Johnson ’s Blue ’ and ‘ Rozanne ’ make marvellous addition to gardens . Their farsighted flowering , vivid color , and easy care make them ideal for any garden setting . Whether you favor one over the other comes down to the looking at you like to achieve and your personal preference .
The ideal ground cover
You could say that Geranium ‘ Orion ’ is like the onetime Geranium johnsonii ‘ Johnson ’s Blue ’ , but much , much good . It is one of the good new hardy geraniums . declamatory blue efflorescence with lavender tints and purple veins opened in huge numbers all summer long , making a big priming top . The broad petals overlap to create roll - form flowers and the blanched centres accentuate the colouring . A seedling of Geranium ‘ Brookside ’ , another fine AGM winner . 75 curium ( 30 in ) . Hardiness rating H7 .
Geranium ‘ Mavis Simpson ’ is a low and go around , almost evergreen plant . It has silvern leaves with lobes that face beautiful against the pink flowers that have a silvery top and dismal nervure running through them . From June to October , flowers bloom , and the fore spread out a lot , but they ’re easy to cut back because they do n’t grow rootage . Found as a fortune seedling at Kew , and named after a Kew nurseryman . 20 cm ( 8 in ) . Hardiness military rank H6 .
The flowering ground cover charge grow quickly , spreads out astray , and bloom of youth for a very farsighted time . The magenta pink flowers with purple veins capable in July and outride receptive until a hard frost . Geranium ‘ Dilys ’ does n’t like it when it ’s dry , but it ’s useful because it can care poor drainage and does well in both full sun and part spectre . Named in honour of Dilys Davies , for many years an influential member of the Hardy Plant Society . 40 cm ( 16 in ) . Hardiness rating H7 .
Purple veins, purple veins
Geranium Rozanne ( ‘ Gerwat ’ ) is a stupendous plant making vigorous ground screening or a striking container specimen . From July to October , a band of saucer - work flowers blossom with purple veins and a bright bloodless center . They are set up against overbold green leaves . It needs a lot of elbow room or looks great implant as a single industrial plant in a expectant batch , where it make a gloomy waterfall of colour . ‘ Jolly Bee ’ has now been label as identical . 60 centimetre ( 2 ft ) . Hardiness rating H7 .
Geranium renardii has some of the most beautiful leave of all brave geraniums . Each all-inclusive , lobed , grayish leaf has the soft feel of salvia leaves . In June and July , sprays of white blossom with deep majestic veins produce just above the leafy mound . This industrial plant continue small and slowly spreads , making it perfect for the front of a sunny border . The leaves look their best when they are juiceless . 35 curium ( 14 in ) . Hardiness rating H6 .
This form of our native Geranium pratense ( meadow crane’s bill ) has delicate patterns that face good both up tight , where you could admire the rich gloss , and far away , where the haze of color stands out . Geranium pratense ‘ Mrs. Kendall Clark ’ has wan blue flowers that open in June and July . The flowers have a net of white veins , and they will blossom again if you cut off the dead flowers . In natural spring , the mound of fresh lobed foliage is also attractive . 90 cm ( 3 ft ) . Hardiness rating H7 .
Many change of this widely grown
A intercrossed plant is the offspring produced by cross - pollinating one specific cultivar with another different cultivar . Cross - pollination , as fight down to pollination between plant life of the same cultivar , usually makes issue that are stiff , healthier , and good . These offspring are call “ intercrossed dynamism . ”
Geranium Rozanne: 6 Reasons to Plant This Special Long Blooming Perennial
FAQ
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