Tall flowers help to add structure and depth to a garden bed.
They also can be used as a living privacy fence or to hide an unattractive backdrop.
Warning
Some flowers may be toxic to animals or humans, as noted below.
The Spruce / Kara Riley
They produce clusters of fluffy blooms from June until frost.
These plants are easy to grow as long as they have even soil moisture with good drainage.
Frost will quickly kill the plants in the fall.
The Spruce / Marie Iannotti
In addition, extremely hot summer weather might limit blooming.
It features five-petal flowers that stretch around 2 inches across and bloom in the summer to early fall.
Butterflies love the flowers.
The Spruce / Evgeniya Vlasova
To promote more blooming, remove the spent flower spikes.
While it brings lots of ornamental value, this perennial does tend to be short-lived.
But it can self-seed fairly well to produce new plants.
The Spruce / Autumn Wood
Clusters of small, hooded blooms arise in the summer above the dark green foliage.
This plant needs moist but not soggy soil, and its soil also never should dry out.
It doesnt have any serious issues with pests or diseases.
The Spruce / Evgeniya Vlasova
They start as red but mature to yellow.
The plant itself grows to around 3 to 4 feet high with a slightly smaller spread.
Red hot poker is fairly easy to maintain.
The Spruce / Kara Riley
But its important to watch out for poor drainage, as soggy soil can kill it.
It can grow to around 4 feet tall and blooms from summer to fall.
The flower spikes arise from a rosette of foliage at the plants base in the late spring.
The Spruce / Evgeniya Vlasova
Several long, tubular blooms are grouped on the spikes, which attract hummingbirds to the garden.
This perennial is short-lived and wont produce flowers until its second year.
It also can look a bit ragged by the late summer.
The Spruce / K. Dave
Thus, many gardeners remove their foxglove plants after theyve flowered and released their seeds for new plants.
Foxglove is toxic to humans and animals.
An excellent tall flower species isA.
The Spruce / Adrienne Legault
caudatus, which can grow to 3 to 5 feet with long panicles of dangling blooms.
Another tall species isA.
All the amaranths are easy to grow from seed.
The Spruce / Marie Iannotti
However, they are susceptible to many common garden pests.
In the late summer, it blooms with daisy-like flowers that stretch roughly 2 inches across.
This plant does require some pruning maintenance, including deadheading to promote further blooming.
The Spruce / Autumn Wood
Once flowering is done for the season, cut back your sneezeweed by half.
The first blooms begin when the plants are only about 1 foot tall.
As the plants grow, more flowers form at the top.
The Spruce / Marie Iannotti
You candirect sowseeds, and the plants easily self-seed in the garden.
It can grow to around 5 feet and produces a jasmine-like scent in the evenings.
During the day, the flowers partially close, and no scent is released.
The Spruce / Leticia Almeida
Flowering tobacco is toxic to humans and animals.
Mexican Sunflower
Mexican sunflowers(Tithonia rotundifolia)are easy to grow and virtually pest-free.
The species typically grows to around 4 to 6 feet tall, though dwarf cultivars are also available.
The Spruce / Evgeniya Vlasova
These tall flowers love hot days and do equally well in high humidity or drought conditions.
However, they can take a while to start blooming.
There are two common species of cosmos.C.
The Spruce / Leticia Almeida
bipinnatushas feathery foliage and daisy-like flowers with yellow centers, and some varieties reach up to 4 feet tall.C.
sulphureusis a taller plant, growing to around 6 feet with yellow or orange flowers.
Cosmos will repeat flower from summer to fall even without deadheading.
The Spruce / Evgeniya Vlasova
Elecampane
Elecampane(Inula helenium)is a flowering perennial thats part of the aster family.
Its blooms have a sunflower-like appearance but with very thin, fringelike petals.
The flowers stretch around 2 to 3 inches across and appear from midsummer to early fall.
The Spruce / Adrienne Legault
The plant overall can reach around 3 to 6 feet high.
Its tolerant of a variety of soil conditions.
But it might need staking if it gets too tall.
The Spruce / Adrienne Legault
This plant is mildly toxic to humans.
In the summertime, it blooms with showy flowers that have five overlapping petals.
And it grows to around 3 to 7 feet high with a 2- to 4-foot spread.
The Spruce / Autumn Wood
This plant tolerates heat and humidity quite well and can be used in a rain garden.
Its important never to let its soil dry out and to protect it from strong winds.
The plant reaches around 4 to 7 feet high with a 2- to 4-foot spread.
The Spruce / Ana Cadena
It will attract hummingbirds and other pollinators to your garden.
But strong winds can damage it, so it must be in a protected site.
Mulching is recommended to retain soil moisture.
The Spruce / Evgeniya Vlasova
The tiny blooms come in attractive clusters and have a pleasant vanilla scent.
Theyre known for attracting butterflies to the garden.
This plant can reach around 5 to 7 feet tall and is easy to care for.
Just ensure the soil doesn’t dry out, or the leaves can scorch.
Joe Pye weed looks best if you have the space to group several plants for more ornamental impact.
Canna
TheCannagenus includes tropical and subtropical plants with showy flowers.
The flower spikes rise above the foliage during the summer.
These plants add rich, warm colors to the garden.
But they have poor cold tolerance and must be brought indoors if the temperature nears 40 degrees Fahrenheit.
The Pacific Hybrid group includes tall flowers that grow to around 4 to 8 feet high.
The flowers bloom in the summer clustered together on columnar flower spikes.
While these plants offer lots of visual interest in the garden, they are fairly high-maintenance.
They usually need staking to keep them upright, along with deadheading and pruning of spent growth.
Delphinium is toxic to humans and animals.
Gardeners have several options when it comes to these annuals.
They grow between roughly 3 and 10 feet high.
Birds love to feed on the seed heads.
However, note that this plant self-seeds so readily that it is considered a noxious weed in some areas.
They grow quickly with glossy green foliage.
In the summer and fall they bloom with somewhat insignificant flower spikes.
Its the reddish-brown seed capsules that have the real ornamental value.
Situate it somewhere that’s protected from strong winds.
So be sure to plant it away from areas with children and pets.
Learn about plants that produce the biggest, most vibrant, fragrant, and dramatic blooms.
North Carolina State University Extension.
Foxglove: Toxic to the Heart.National Capital Poison Center.
Toxic Plants.University of California.
Inula helenium.North Carolina State Extension Toolbox.
North Carolina State Extension.
Common sunflower.Invasive Plant Atlas of the United States.
North Carolina State Extension.
