Now that fall is here, and life in the garden is beginning to slow down (ever so slightly), I am thinking about next year’s garden.
It’s been a wonderful summer here for swallowtail butterflies. I enjoy spotting the caterpillars that continue, even now, to overwhelm my small stands of bronze fennel (one of the construction workers building our addition said he counted 19 on one plant last week!).
But as you may have heard if you live in the US, this has been a bad year for monarch butterflies (Danaus plexippus). Habitat destruction and widespread use of pesticides have contributed to profound declines in numbers over the past few years. In the past, I have tried to grow plants attractive to all kinds of pollinators, but as I plan for Winter Sowing 2.0, I intend to sow and plant for monarchs in particular.
Monarch larvae feed on milkweed (Asclepias sp.), and females will only lay their eggs on these plants. Different species of milkweed are recommended for different areas of the US: Monarch Joint Venture has a map and fact sheet about them.
But migrating butterflies need nectar plants as well. Monarch Watch is a wonderful source of information on ways to help contribute to conservation of this species (as well as other butterfly species), including recommended nectar plants. I think my household may try to become certified as a Monarch Waystation next year (I feel a Girl Scout project coming on).
Many milkweeds species perform well with winter sowing–a technique in which the gardener sows seed in a simple pot or flat and leaves it exposed to the elements all winter long. The gardener doesn’t tend the seedlings until it’s time to pot them on. It couldn’t be easier–so there is little excuse for me to not try to help this beloved and charismatic species recover from the challenges it has suffered.
I hope that, if you garden in North America, you will explore resources like Monarch Watch and Monarch Joint Venture to find out ways you can help. There are wonderful citizen science programs around through which gardeners and homeowners can assist with migration tracking and population counts. No garden is too small to contribute to the conservation of these creatures.
I have a lot of milkweed and only saw a few caterpillars this year. It was really disheartening. I grow a lot more orange milkweed because it likes dry soil than the swamp milkweed. In my garden, the orange (a. tuberosa) self seeds easily while the swamp milkweed struggles. Which kind did you add? They are also attracted to liatris ligustylis.
I am adding A. tuberosa, A. incarnata, and (I hope) A. variegata. I haven’t seen A. variegata before, but if it is good for thickets and woodlands, I need to try it. That is my garden in a nutshell! I am also hoping to try a few varieties of liatris; you are right, they love it. I tried growing liatris once before but that summer was extremely hot, and it died. If I can find some plants on sale at local nurseries for the end of the season, I will snap them up. Fall planting is truly the way to go in our climate, isn’t it?
I added some of the a. tuberosa and planted out some incarnate too (they seem to be the most popular around here) but no butterflies most of the year. This post came to mind yesterday afternoon though when I went out into the garden and found about a dozen monarchs floating around. The monarch migration must have reached this end of Pennsylvania an maybe in the dry weather my verbena bonariensis became their best bet as just about everything else local has dried up.
I am so delighted to hear this! I do hope they gorged themselves on your verbena. They are a resilient and adaptable species but as a society we are really putting a big burden on them. I’m glad your verbena made it through your droughty summer; your remarks remind me of the importance of planting a wide variety of nectar plants. If one plant fails, perhaps another will fill its niche for the season. Good luck, monarchs!
Being in the desert, I know we have butterflies, but not sure how they survive when the heat rises.
Thanks for this interesting and delightful part of nature.
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