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Hydrangea Petiolaris.
Most Hydrangeas are not climbers, but are big and blousy bushes divided into two general types with flowers of one type called “Mop head” and the other “Lacecap”. There is however, also one type of climbing Hydrangea that can normally be seen on sale and that is Petiolaris. It is a true climber with sucker like aerial roots that cling like Ivy, but it does take time for the plant to develop it’s clinging habit as it gets bigger and it may need a little support until then.
Hydrangea Petiolaris can attain a height of up to 50 feet, although it isn’t the fastest of climbers.
Originating in Asia, this white-flowered sub-specie, is fully frost hardy and as such will be at home in any English garden.
As with other Hydrangeas, Petiolaris has thick, fleshy stems and large, soft, deciduous leaves. The showy, white, flower heads are lightly scented and appear in Summer as with other Hydrangeas. With ordinary Hydrangeas the acidity of the soil is important as it affects the colour of the flowers changing the blue flowering types to reds if there is too much lime present, but this is not the case with Petiolaris as it is always white. In fact it is not fussy about the soil at all and will quite happily grow in everything from heavy, to light, sandy soil as long as it has some moisture.
Hydrangeas do not like full sun and because of this, Petiolaris is one flowering climber that is quite suited to a semi shaded, north facing wall.
Cuttings of Hydrangeas are fairly easy to root anyway, but as Petiolaris throws out aerial roots it is particularly easy to cut off a piece with roots already forming which will quickly develop if put in compost.
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