Planting above rainwater Soakaway
First post and I am pretty new to gardening so any help would be appreciated
We are having to have a new soakaway dug and to cut a long story short the easiest place to put one is in this circular bed in our front patio.
The current plant (I think its a castor oil or false castor oil plant?) will need to be removed. Our builder says anything with a shallow root system will be fine to plant on top…so any suggestions!?
Id like a large shrub/brush and for it to be a least 1m tall (pref around 1.5m tall) and flowering, it MUST have a shallow root system…I was thinking maybe a Hydrangea (if so suggestions on variety) but would welcome any other suggestions.
The bed is quite big…around 2.5m across and I'd like little or low maintenance if possible?