I'd prolly give it 4 weeks. My peppers took a LONG time to sprout, and so have some other things, depending on how well I take care of them, how warm it is, etc. Let us know what you planted and maybe we can give you a better answer.
For example, Radishes sprout super quick, so I'd give up on them after 2 weeks.
Cara
For example, Radishes sprout super quick, so I'd give up on them after 2 weeks.

Cara