Is Preen Outdated

Yes there is a expiration date, which it has been year it may be. I would email Preen for a answer.. It worked so well for me. Just make sure you pull any weeds and then add it.

How long can you store pre-emergent?

Pre-emergent can remain effective in your lawn for 2–6 months, depending on the type you use. During this time, it will kill all grass, weeds, and other plant seeds as they sprout.

How long does Preen Mulch last?

Preen® Mulch with Extended Control Weed Preventer creates a barrier that inhibits weed seed growth. The barrier lasts up to 4 weeks in New York, or up to 6 weeks in states other than New York.