Note: See comments below for discussion on native vs tropical milkweeds
We planted a couple milkweed (Asclepius curassavica or tropical) plants three years ago. But – no monarchs or caterpillars. The last six months the milkweed thrived and climbed seven feet up into our magnolia tree, and also spread via seed. Now we have a couple dozen plants out front.
One week ago, after a short trip away, I was watering and noticed a huge caterpillar (see right) and then saw more. Yea – finally!