PLANT of the week

Erysi­mum ‘Jumbo Orange’

Irish Daily Mirror - - GARDEN -

■ This is a lovely new in­tro­duc­tion from Plant World Seeds, a small fam­ily firm in Devon. Ev­ery year its cat­a­logue is a de­light­ful col­lec­tion of un­usual seeds and this flam­boy­ant wall­flower caught my eye.

They have de­vel­oped a peren­nial va­ri­ety with fra­grant bright orange flow­ers which open in late win­ter. Also of in­ter­est are the Dahlia Au­tumn Daz­zlers, a new gen­er­a­tion of tall el­e­gant dahlias hy­bridized at Plant World.

These are hardy sin­gle forms, with the oc­ca­sional dark leaf spec­i­men, that will flower in a sunny spot from late sum­mer un­til first frost. For more in­for­ma­tion, visit plant-world-seeds. com or phone them on 01803 872939. Re­cently you ad­vised a reader to choose a clump­form­ing bam­boo tree to cover her ar­bour. We have what must be that type – and it’s tak­ing over.

It is start­ing to push up flag­stones on our pa­tio and is now also in­fring­ing on our neigh­bour’s gar­den. How do we go about re­solv­ing this is­sue? Thank you in an­tic­i­pa­tion. Margaret Treacy

Co Antrim

Hi Margaret

Un­for­tu­nately, there’s no easy an­swer to this. Un­less you re­move the bam­boo from the area be­side the flag­stones and in­sert a root bar­rier around the ‘mother plant’ the is­sue will con­tinue. Some species have vig­or­ous near-sur­face roots, and your bam­boo is one of them.

Their vig­or­ous growth can move ter­races, decks and paths that are in their way! So, dig up

the ex­tended parts of the plant, and use a thick black plas­tic ver­ti­cal mem­brane to a depth of 60cm. This will al­low you to control the orig­i­nal plant.

These bar­ri­ers are ideal for con­trol­ling run­ning rhi­zomes such as those of the Sasa, Sasaella and Pleioblas­tus species when space is lim­ited.

Dig a track 58cm deep which will leave you with a 2cm sec­tion of the bar­rier pro­trud­ing the sur­face when it’s fit­ted. Rhi­zomes oc­ca­sion­ally creep over the sur­face so this small pro­tru­sion will stop them.

Place your bar­rier ver­ti­cally into the track and back­fill with soil as you go.

If you come upon any ex­ist­ing rhi­zomes when dig­ging your track, just re­move them. Be care­ful to re­move any other rhi­zomes from out­side the ex­tent of your planned area if they have spread.

If you keep your bam­boo within the bar­rier well fer­tilised and wa­tered, it’s less likely to spread out in search of nu­tri­ents. Best wishes, Diar­muid

ROSA MUM Dear Diar­muid

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