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It can also be used in the front of the perennial bed or planted in clumps amongst other low-growing , shade tolerant perennials . Master gardener Paul James fields questions from gardeners : Q. Paul , I took your advice and planted a clump of Fargesia bamboo in my Zone 7 garden last spring , and now the leaves are brown . ( 2 ) Senecio exhibited a higher rate of population growth when planted amidst clumped Poa than when planted amidst a random distribution of Poa . He likewise directed that Redbuds be planted among clumps of native trees and shrubs at Poplar Forest in 1812 . Re-vegetation was carried out using herbaceous cover and woody species planted in clumps and strips . planted in clumps to the north-eastward of the bombarding ships . Bulbs should be planted in clumps rather then singly or in straight rows . The smaller bulbs will be effective when planted in clumps placed randomly throughout the chosen area .