Here's our 'escape-proof' planter, make the barrier 900 mm deep (that's 3')
Download the 'escape proof' planter set up -pdf - right here
(in hindsight)
Trench into existing bamboo grove to twice the depth of the existing rhizome material.
Lay Rhizome Barrier sloping away at the top and towards the bamboo grove at the bottom.
Back-fill both sides. Don't use sharp objects against the Barrier. Sand is fine.
This will stop clump expanding over the boundary
For medium Clumping Bamboo 3 - 8 metres tall
Install Barrier, approx. 450 mm deep x 1 metre (18" x 3'), to prevent growth in a particular direction.
For example, hard up against a boundary or adjacent to a pathway.
1. Dig planting hole and position bamboo as far from boundary as suitable.
2. Position barrier next to bamboo.
3. Backfill.
Rhizome Barriers
HDPE = High Density PolyEthelyne
HDPE barrier material is supplied off-the-roll, either 600 mm or 450 mm wide, it's easy to cut with a box knife.
HDPE Rhizome Barrier 450 mm deep x 50 m roll
HDPE Rhizome Barrier 900 mm deep x 40 m roll