Table 2.
Root growth of trees with and without ground covers.
No competition
English ivy
Liriope
Dwarf bamboo
Cottonwood
35 g
23 g
28 g
26 g
% reduced
™32%
™19%
™24%
Silver maple
77 g
27 g
40 g
72 g
% reduced
™65%
™40%
5% NS