Just because they don’t respond at your speed, doesn’t mean they aren’t interested.
Clients, Prospects, Vendors, and Partners will each move at their own speed, so while you can and should follow up, don’t be too hasty in expecting them to respond or commit.
It’s Ok for them to be on their own timeframe, not on yours, especially when it comes to Prospects and Clients, so enable and facilitate their timeframe. No one likes to be pushed (a gentle nudge is Ok) into doing something when they are not ready to move.
If you fight that natural tendency, it can be like trying to push a large boulder up a hill. It starts out not too bad, but gets progressively more difficult the further you go on that path.
Nurture them and keep yourself top of mind. An email campaign is the go-to these days, but mix it up and add in calls or other things that are appropriate for your business like live events or incentives to get them into your retail location.