We have lavender plants partially edging two of our fruit beds. I am trying to create a complete edge around the beds but originally I didn't have enough plants and so I compromised and edged just two sides of the beds. The beds only have three edges - I know that sounds strange but along the fourth edge is the row of summer fruiting raspberries. I planted some rooted cuttings along the third edges last year but these are only growing really slowly.Just to clarify the beds are set out like this.
The large purple dots represent the old lavenders and the small dots represent the smaller ones taken as cuttings but seeming not to want to grow.
I do trim the lavender hedge every year to try and prevent it from becoming bare and leggy but the problem is that over time weeds and grass has grown through the lavender and I want/need to remove it somehow! The only option seems to be to dig up the lavender plants and clean them of weed roots and replant them but ... when should I do this?