What’s Eating My Black Eyed Susan Leaves

Why are there holes on my black-eyed Susan leaves?

It sounds like your black-eyed Susans have a mildew or fungus. Make sure you clean the bed out thoroughly this fall and dispose of all the material. In the meantime, treat your plants with an all purpose fungicide.

How do you treat black-eyed Susan leaf spots?

If your Rudbeckia suffers from leaf spots each season, you may consider applying a copper-based fungicide to the plants when they emerge and continue treating them on a schedule to prevent infection.

What's wrong with my black eyed Susans?

A. Black-eyed Susans (Rudbeckia spp.) are susceptible to a number of leaf spot diseases that could cause the symptoms you describe. Septoria leaf spot is one of the most common fungal diseases, characterized by small, dark brown leaf spots that range in size from 1/8- to 1/4-inch in diameter.

How often should I water my black-eyed Susans?

Water well whenever the top inch of soil around the plants is dry. (A good rule of thumb: If you see the leaves drooping, the plant needs water.) Keep in mind, though, that over-watering will cause more problems with black-eyed Susans than under-watering.

Will deer eat black-eyed Susan plants?

Black-eyed Susans

Because its covered in course hair, deer and rabbits stay far away from it. These daisy-like blooms are perfect for a late summer or fall bouquet. They tend to grow to about 2 feet tall and handle high heat and drought conditions well.

Should you fertilize black-eyed Susans?

While you do not need to water or fertilize Black-Eyed Susan plants, a little extra love and care will be rewarded with more blooms. Keep plants well weeded when young. Established will grow in thick clumps, and usually will not need weeding.

How do you deadhead black eyed Susan vines?

You can easily deadhead black-eyed Susans (Rudbeckia hirta) any time you walk through the garden. Simply identify a fading flower and twist it off with your fingers. Toss the deadheaded flower back into the garden to recycle nutrients and possibly enjoy new black eyed Susan plants the following spring.

Do aphids like black-eyed Susans?

Insect Pests

As with many other types of garden plants and flowering perennials, aphids are the primary insect pest of black-eyed Susans.

Are monarch butterflies attracted to black-eyed Susans?

Perennial Nectar Flowers for Monarch Butterflies

The purple coneflower (Echinacea purpurea) is a popular choice for both monarchs and gardeners, and so is the black-eyed Susan (Rudbeckia). A spiky purple perennial called gayfeather (Liatris spicata) will attract many species of butterfly, including the monarch.

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