Good point, JT!
I imagine that the SC would –
‘Resolve to purchase and install X number of planter boxes of a size x by y by z in the positions indicated in the accompanying diagram, also X number of bags of concrete with which to fill the planter boxes and X number of plastic plants to be placed therein. Total price for the above, plus delivery estimated at $xyz.
Your Strata Committee proposes a Working Bee on x/y/2019 to carry out these works.’
I would suggest lining the boxes with plastic and dumping the bags in whole. Then punch holes in the bags and pour in water – this will make it a lot easier to extract the set concrete if it was ever decided to do so.
I’m assuming that the SC has the authority to spend this kind of money. If not, it’s time for an EGM.