The plant can tolerate very alkaline soil.
Wallflower Care
Here are the main care requirements for growing wallflowers.
Light
Wallflowers should be grown in a bright, sunny location.
While they can tolerate part shade they will thrive infull sun.
Soil
Well-drained, dry to medium-dry soils are ideal for wallflowers.
Wallflowers can grow in very alkaline soils (pH 7.0 to 9.0).
Water
Wallflowers are considered drought-tolerant, and as such, they do not require too much water.
Only water wallflowers regularly as they are becoming established, and then cut back once they have matured.
Below their hardiness range, wallflower is usually grown as an annual.
Types of Wallflowers
Most wallflowers are cultivars or hybrids.
Notable varieties include:
Pruning
Deadheading is important for keeping wallflowers healthy and full-looking.
To encourage ongoing blooming, pinch back spent blooms regularly.
How to Grow Wallflowers From Seed
Wallflowers grow readily from seed.
Choose a container that is large enough to accommodate the root system plus about 6 inches.
Ensure your container has adequate drainage as wallflowers do not tolerate having their roots sit in water.
Choose a well-draining potting soil.
Repot the plant when its roots fill the container, or grow out of the drainage holes.
Outside of its hardiness range, it is best to grow wallflower as an annual.
These include flea beetles,aphids, andcabbage worms.
Wallflowers may be susceptible to clubroot, a disease that also affects plants in the cabbage family.
It is not classified as a fungus or bacteria but it does produce spores.
Plants with clubroot will look stunted and wilted, or the roots will look swollen and thickened.
There is no other treatment but to pull and compost the infected plants.
What Does Wallflower Look and Smell Like?
Wallflowers are sweetly scented.
check that the plants are growing in full sun.
Do not fertilize to force the plant to produce more flowers.
In a climate where it won’t survive the winter, the wallflower is usually grown as an annual.
Common Problems With Wallflower
Wallflower plants are generally easy to grow and low-maintenance.
A plant purchased from a nursery, on the other hand, should bloom the first year.
Becoming Leggy
If wallflowers look leggy, the plants need to be shaped up through pruning.
Do this after they bloom in the spring or summer by pruning the stems by half.
Wilting and Limp
Wallflowers may prematurely wilt if they contract clubroot or if they are overwatered.
If overwatered, cut back on moisture to see if the plant rebounds in a couple of weeks.
That depends on where you are located.
In warm climates, wallflower plants bloom nearly year-round and can be grown as a short-term perennial or biennial.
In cooler climates, they are mostly grown as annuals.
Wallflowers are not considered invasive.
Perennial types are sterile.
Biennials may self-seed but unwanted seedlings can be easily removed.
The Western wallflower (Erysimum capitatum) is native to North America.
It is also known as the sanddune wallflower or prairie rocket.
Erysimum x cheiri.North Carolina State University Cooperative Extension.
Clubroot.University of Minnesota Extension.
