Changes

===Underdrain===

===Underdrain===

Stormwater planters differ fundamentally from [[bioretention]] in that the storage function is provided only by the [[water retention capacity]] of the [[filter media]]. As such there is no storage reservoir and the only purpose to the aggregate layer is to drain water to the perforated [[pipe]]. For this, a medium aggregate as described in [[choker layer]] is recommended as it negates the need for a separating layer to the filter media.  

Stormwater planters differ from full and partial infiltration [[bioretention]] in that the storage function is provided only by the [[water retention capacity]] of the [[filter media]]. As such there is no storage reservoir and the only purpose to the aggregate layer is to drain water to the perforated [[pipe]]. For this, a medium aggregate as described in [[choker layer]] is recommended as it negates the need for a separating layer to the filter media. Design details can be found here n  [[Underdrains#Underdrains for non-exfiltrating practices|Underdrain]] for non-exfiltrationg practices.

[[Underdrains#Underdrains for non-exfiltrating practices|Underdrain]]

===Planting===

===Planting===