Yes you can release them right onto the milkweed, and no they will not harm the cats. Just a word of caution. When you do release the ladybugs, make you do it at night. or many if not all will fly away.Won't ladybugs eat the caterpillar eggs?
I have a small update. I checked on a lower leaf, and it was infested with those aphids. I killed them all by hand. I ordered ladybugs online. Can I release them near the milkweed? Will they harm the live caterpillars
Here's a great site on milkweeds. If you are looking for native milkweeds local to your area, click on 'Locate milkweed' , then click on the state you live in.speaking of this plant. my recent garden mag. featured the Cinderella swamp milkweed variety. so pretty. anyway, it reads that there are 140 species of milkweed. looking forward to reading up on all of them. we still have a garden area that needs more stuff planted, down in the valley, which is about 100 paces from our back door. As we lean toward plants that help mother nature this will be a great choice. the Cinderella only goes 3 foot wide and 4 foot tall, would want a larger variety.
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