Choosing trellis flowers by season and USDA hardiness zones helps gardeners match bloom time, winter survival, and vine strength to local conditions. For related guidance, see [Cold-Hardy Climbing Flowers](/cold-hardy-climbing-flowers) and [Seasonal Trellis Plants](/seasonal-trellis-plants).
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North American gardens
Are Sunflower Seeds Good for Backyard Squirrels in U.S. and Canadian Gardens?
Sunflower seeds can be a safe occasional treat for backyard squirrels in U.S. and Canadian gardens when they’re plain, unsalted, and fresh. The key is moderation—too much can crowd out a natural, varied diet and create messy feeding spots that attract more squirrels than your yard can handle.


