It saves a lot of work later to make sure all the grass and weeds are killed in new beds before planting them. The best part of preparing a new flower bed is planting day but be sure to put in all the preparatory work ahead of time. If the grass is not all the way dead or some bind weed is coming up, deal with that first and postpone planting until it is all dead. Weeding around new plants is hard on them and disturbs their roots. If the weeds are allowed to grow alongside the flowers they will compete for space, water, and nutrients and flowers may not be as robust. Even if a bed does not appear to have any weeds growing, seeds and root fragments may remain. Leave the bed empty for a month to see if any weeds sprout. Do your future self a favor and start off with a clean bed.
