Milkweed can adapt to various growing conditions. However if you want to attract Monarch butterflies, which are a field species, your plants should preferably be located in an open space not too close to buildings or trees or tall shrubs. Below are some examples of good and less good locations to attract Monarchs.
This Swamp Milkweed was in a full sun location back in Aug. 2012 (north is behind plant).
Butterfly milkweed well located for now (Sept. 2018), until the Smoke Bush overshadows it (north is behind to the left).
Swamp milkweed is a perfect choice for a rain garden – Sept. 30, 2018 – Stratford, PEI
Two 2-year-old Swamp Milkweed clumps newly planted, lower than the rest of the garden, and in an open area (north behind plants) – Nov. 3, 2018
The same clump is now overshadowed by the forsythia shrub and dwarfed by the juniper behind it, six years later.
Poor planning : see the Hemlock right beside the Butterfly Milkweed? This was back in 2009.
The rain garden following a rain event – Nov. 2018
Another example of poor planning: these Swamp & Butterfly milkweeds used to have lots of sun (north is behind on left) but the Black Locust is now overshadowing them – Sept. 30, 2018
This Butterfly Milkweed has been there for many years (north is behind plant), but now the cedar is taking over and the dappled willow is overshadowing it.
Nine years later (Sept. 2018): the Butterfly Milkweed used to be where some Angelica grows now, UNDER the tree!
Old stand of Butterfly Milkweed in open area (north on left side) – Nov. 3, 2018
The same Swamp milkweed clump is also now too close to the Forsythia shrub on the right – Sept. 2018
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