I don't know; for years I've mowed some areas with milkweed in the first week of July, and found that they young sprouts that come up afterwards got all the eggs. Susan Sawyer ----- Original Message ----- From: MARIE HEMEON To: [log in to unmask] Sent: Wednesday, June 30, 2010 8:04 PM Subject: Re: [VTLEPS] monarchs and milk weed I would have suggested May at some point. For now I would say after first frost. If they are there now, it is a good bet they are laying eggs. ----- Original Message ----- From: Martha Pfeiffer To: [log in to unmask] Sent: Wednesday, June 30, 2010 7:26 PM Subject: [VTLEPS] monarchs and milk weed When can I safely mow a meadow filled with milkweed and circling monarchs? martha