The white hand-embroided (by my mom) pillow case full of lavendar is still hanging in my closet from two years ago. 
Their job, to keep moths out of my closet, seems to be working still. The scent of the lavender is still here, — just crushing the pillowcase between my fingers releases the scent.
Rather an smelly moths balls, you can use lavender to protect your clothes from moths.
Harvesting lavender buds in a pillow case is a new-mess, easy and foolproof way to strip the lavender buds off the stem, so that you can use the flowers — for sachets, recipes (yes, it’s edible), the for bath bombs — or to keep the moths out of your closet.
You simply cut your lavendar stems right off the plant. Be sure to do this before the lavender buds have opened completely — the oils are stronger just before it’s fully bloomed.
Then, throw everything in to a cotton bag, and roll them around until the flowers fall off the stems.
You can leave them like it is — hanging your pillow case in any spot where you need moth prevention. Or, if you’d like to have the flowers only, use a not-to-tight strainer, sift the flower buds through to separate the broken woody stems from the buds.
Susie, we have a lavender farm a few miles away and I appreciate your advice. The smell of lavender is so soothing.
Love, J.