We've verified that 2 monarch larvae have made their temporary quarters in our backyard. They seem to add significant body mass almost every day. This makes sense given the warm days of summer are numbered and their goal is to pack on the milligrams with the hope of metamorphosing many weeks before the first frost. The milkweeds look like Swiss cheese but that's just fine. They were grown as food and the more that is consumed the greater our success. If you have even an empty planter, YOU CAN DO THIS TOO!