They are usually used to form flowerbeds or borders. They need the same care as the roof-gardens. They are seasonal flowering plants with deferred flowering according to different species during the whole vegetative time. Withered flowers have to be removed from time to time while exhausted and parched vegetations have to be removed at the end of the vegetative cycle. This in order to keep the flowerbed in good and tidy conditions. The greatest part of this kind of plants tends to spring up abundantly by means of runners, rhizomes and so on, particularly at the end of the vegetative cycle. The vegetation is very thick and full making even difficult to carry out the usual agronomical cares (weeding, hoeing, and manual weeding). It is consequently necessary to make strong pruning to allow the actual vegetative renewal in springtime as well as relevant proper growth.