I have a couple of Rudbeckia plants; however, the flowers dry up and look bronzy as soon as they bloom. The flowers in gardening books look pink and pretty. What can I do to make them look healthier?
Rudbeckia tends to be yellow and brown. There is a flower that looks similar to Rudbeckia and is pink.This is Echinacea, also known as Purple Coneflower.
I bought a different kind of rudbeckia not realizing the height was 5 feet.
While you really cannot do anything about its height per say, you can trim the plants or deadhead to encourage more compact growth.
Is there a way to kill an invasive rudbeckia without having to dig it up? Thanks.
Unfortunately, unless you want to resort to herbicides, like Round-up, digging the plant up may be the best way to remove it. Getting it before it flowers and subsequently drops seed will help with 'pop-up' seedlings too.
I am digging perennials from an old bed where the plants are not marked. I need help distinguishing between rudbeckia and coneflower leaves. Also, need to see what the leaves of a peached leaf bell flower looks like.
A rudbeckia leaf: http://www.missouriplants.com/Yellowalt/Rudbeckia_laciniata_leaf.jpg
Peach Leaf Bellflower: http://pics.davesgarden.com/pics/2007/10/27/Xenomorf/a763aa.jpg
Eastern Purple Coneflower: https://www.minnesotawildflowers.info/udata/r9ndp23q/pd2/echinacea-purpurea-6.jpg
Something is eating the petals.
Something has been after mine too! I have found aphids on my plants, but leaf spot can be an issue also.
Treat with Neem Oil, as it works as both a fungicide and insecticide.
I have planted perennials I never had before. I don't know if I should cut them back in the fall like we do for hostas and others. They are: Jupiter's Beard, Gaura lindheimeri, Golden Groundsel (rudbekia), bugleweed, aster, serbian bell flower, wormwood-Powis Castle, Chrysanthemum.
I'm listing links for the plants you mention.
You generally can leave most perennials to die off themselves. I choose to leave some for winter interest, Black Eyed Susan is quite lovely in the winter.
Cutting the plants back to about 4 to 6 inches in height at the end of the season can help neaten up the garden and make spring clean up easier.
This will help with pruning and winter care.
How can you tell if your Black-eyed Susan is an annual or perennial??
Rudbeckia is a perennial.
The Black Eyed Susan Vine is grown as an annual in climates colder then zone 10.