Cold-tolerant, shade-loving flowers are rare, but options like bleeding hearts, hellebores, and primroses can be planted in October for a pop of spring color.
12 Shade-Loving Flowers To Plant In October For Bursting Color Next Spring

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Cold-tolerant, shade-loving flowers are rare, but options like bleeding hearts, hellebores, and primroses can be planted in October for a pop of spring color.