Worm cocoons?

Found a ton of worm cocoons in my bins today and was wondering what the time line is for them to hatch into the miracle workers they are?

3 - 5 weeks. each cacoon can have 20 worms

WOW, that's a lot of worms per cocoon. I thought there was just 1 per. Thanks hyroot!!!

When they're a brown color like the majority in your picture they're probably already hatching. The ones with indentations on them or that look saggy have definitely started hatching