Perennials: Rose Rosette Disease is an infection of roses, including native, cultivated and introduced wild roses. The invasive multiflora rose was first infected with the virus and it now is prevalent throughout the country. Symptoms: thickened stems, multiple stems (witch’s broom) and others. There is no cure. Plants must be dug up, including the roots. Another reason to remove invasive plants such as multiflora rose from our properties and public lands.
Flowers: It’s not too late to put together handsome containers as a focal point or to add color to a drab corner. Plant with “fillers, spillers and thrillers,” annuals and perennials and specials from the nursery.
Vegetables and fruits: The most critical time to water crops is when the fruit is developing or enlarging — for example, development of onion bulbs, broccoli heads, cucumber fruit etc. usually 6-8 weeks after planting. Lack of water can decrease yield and quality. For tomatoes ample water at flowering and fruit set is very important.
Trees and shrubs: Many of our favorite evergreen and flowering shrubs come in small sizes now. Some of these new compact varieties of hydrangeas, arborvitae, ninebark and cypress will fit into limited space.
Lawn: Watch for emerging Japanese beetles during hot spells. Treat grubs promptly.
General: Take the holiday weekend off from garden chores and wave the flag for Independence Day!
— Susan Henry, master gardener with Cornell Cooperative Extension of Westchester