Feed. Fertilize roses (Rosa spp. and cvs., Zones 3–9), lilies (Lilium spp. and cvs., Zones 3–10), and dahlias (Dahlia spp. and cvs., Zones 8–11) to encourage continuous growth and blooms.
Deadhead lavender (Lavendula and cvs., Zones 4–9). Remove spent lavender flowers to tidy up shrubs.
Water some more. Ensure that newly planted trees, shrubs, perennials, and annuals are getting adequate water.
Pull tattered foliage. Remove spent and dormant late spring foliage from perennials.
Prune Japanese maples (Acer palmatum var. dissectum, Zones 5–9). Late summer is a good time to lightly prune summer-dormant Japanese maples.
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