I wonder if anyone can give some advice. I have a long 'Brighton beach' garden ( lots of small pebbles. This covers a dark secret of Japanease knott weed which developed in the garden some years ago. My dad has dealt with it ( and its worked as it not long billows up each summer) by:
1. laying a layer of thick sheet plastic on top
2. putting the pebbles on top.
Now: I want to build some raised beds, the plant veg. I have built 2 3ft x3ft boxes ( no base and these sit on the pebbles.
How do I ensure good drainage before filling the boxes with soil b4 planting?
Could i clear 4 spaces amonsgt the pebbles and cut holes in for drainage or should i just puncture the plastic in several places?
what do you think?