Although more commonly available in granulated form, weed and feed is also available in a liquid form for spraying onto your lawn. It is applied using a sprayer that is attached to the end of your hose with the concentrated liquid in the reservoir. Water is mixed with the weed and feed as it moves from the end of the hose, through the sprayer and out its nozzle. A few tips are recommended to get the best results with liquid weed and feed.
Do Not Spray on Windy Days
Liquid weed and feed contains herbicide and can kill herbaceous perennials and other desirable plants. Even a light wind can carry enough liquid weed and feed onto such desirable plants and kill them. A good time to spray is just before sunset, as the wind tends to die down at this time of day.
Do Not Spray Beyond the Lawn Borders
Use caution when moving the spray head around and do not allow the spray to extend beyond the borders of the lawn, such as into flower, vegetable or shrubbery beds. Sensitive plants can succumb to even a small amount of herbicide inadvertently sprayed on them.
Do Not Apply When Temperatures are Above 85 Degrees
Many herbicides morph into a gas if applied when air temperatures are above 85 degrees Fahrenheit. The herbicidal gas can move through the air and settle on plants in another location, damaging or killing them.
Do Not Apply Too Often
Herbicides in weed and feed products can become concentrated in the soil and kill or damage trees or shrubs growing in or next to the lawn. Chemicals in weed and feed can also contaminate groundwater and nearby streams and lakes. Weed and feed should be applied sparingly once a year in autumn.