Sit down with her and explain how you would like her to scatter the petals, perhaps a small handful of four or five petals with each step she takes, so you don’t end up with all the petals at the entrance and none near the altar. Ask her parents to practise this with her in the lead up to the wedding.
Walking down the aisle may sound simple enough but your flower girl will also need to practise her processional pace; otherwise, in the excitement of the moment, you may find her hurtling headlong down the aisle. She will need to practice walking in her dress which may be longer or stiffer than she’s used to, and also walking with her basket which may be quite heavy for her small arms.