Yarrow
Yarrow flowers are also known by other names such as Achillea Millefolium or common yarrow.
These flowers are available in different colors including white, yellow, red, pink, light purple, and maroon. They hail from temperate parts of the Northern Hemisphere, and have been introduced in other areas, too.
These herbs spread very easily and are classed as a weed in some places, happy in both dry and wet soil.
If you plant them in a border, expect to see some appearing in your lawn and nearby beds!
The flower heads form as large, flat clusters of tiny individual flowers, and bees absolutely love them.
Yellow archangel
Lamium galeobdolon, the artillery plant, yellow archangel, or yellow weasel-snout, is a herbaceous perennial wildflower native to Europe.
It’s part of the mint plant family, and you can see the resemblance in its ability to spread, becoming invasive in some parts of the world, as well as its square stems.
It has long leaves that grow up to 80cm tall, and it produces hooded yellow flowers.
The yellow archangel plant is a good choice for a ground cover plant which will provide plenty of color, spreading quickly.
Check with your local authority before introducing this plant into your garden, as in some places its sale is banned altogether, as it can be a real problem for local plants.
This plant is very drought tolerant, and suits gardens in zones 4 through to 9. It likes shade, and will do well in very low light levels.
Yellow Bells
Tecoma stans, yellow elder, or yellow bells, is an ornamental flowering shrub native to the Americas (see also How To Grow And Care For Yellow Bells).
It comes from the Bignoniaceae plant family, also known as the trumpet vine family.
This semi evergreen shrub is capable of growing up to 20 feet tall, producing bright yellow, bell-shaped flowers. It’s capable of blooming all year round in zones 8 to 11, provided that you give it a position of full sunlight and plenty of moisture.
It’s also a good choice to encourage more wildlife into your garden, inviting hummingbirds, bees, and butterflies to the nectar-rich flowers.
This plant will withstand drought without a problem, and prefers warm, balmy weather.
Unfortunately, the yellow bells shrub can be invasive in some areas, where it grows too vigorously for native plants to compete with, so check with your area to make sure it’s safe to plant it.
Yellow Coneflower
The yellow coneflower, or Echinacea paradoxa, is a perennial sure to brighten up your garden. It’s perfect for borders, containers, and mixed beds, providing a wealth of color in summer.
It helps that this plant is resistant to deer, and it’s easy to grow, even from seed.
Yellow coneflowers will come back year after year if you plant them in USDA zones 5 to 8, otherwise they can be treated as summer bedding plants.
They need well-draining soil, and a sunny position in order to thrive, where they can get between 24 and 36 inches tall.
Yellow Flag Flower
Iris pseudacorus, or the yellow flag flower, comes from parts of Europe, Asia, and Africa.
While most irises prefer well-draining soil, the flag iris loves permanently wet soil such as marshland, wetland, damp forests, and edges of ponds, lakes, and rivers.
These sunshine-yellow flowering plants can get anywhere from 40 to 100cm tall, blooming in summer. It’s worth noting that this plant spreads easily, and can bully other plants to take over ponds and other places completely.
They are also ‘escapees’, where they spread from domestic gardens into the wild, and this can be a huge problem.
To keep it under control, you can plant it within a water basket, stopping it from spreading.
These plants are hardy in zones 5 through to 9, and will thrive in full sunlight or partial shade. Just make sure the soil is wet enough for the yellow flag iris to thrive.
Yellow Wax Bells
Kirengeshoma palmata, or yellow wax bells, is a beautiful flowering shrub from the hydrangea family (see also Hortensia Grow Guide And Care).
Unlike the hydrangeas, this plant will grow better in shady conditions over full sun, every time.
It has large leaves shaped like the palm of your hand, and produces bright yellow, waxy flowers.
There are only two plants within the Kirengeshoma genus, Kirengeshoma koreana, and Kirengeshoma palmata. The former, as you might guess, comes from Korea, while Kirengeshoma palmata hails from Japan and eastern parts of China.
These plants like plenty of moisture in well-draining soil, and grow well in zones 5 to 8. They can reach a maximum height of 4 feet tall.
Yellow Wild Indigo
Also known as Baptisia sphaerocarpa, this upright perennial plant is worthy of any garden planting scheme.
It’s an excellent choice for borders, containers, and mixed beds, since it’s hardy in USDA zones 5 through 10, and tolerates both dry and moist soils, as long as they drain well.
It’s also one of the easiest perennials to grow, happiest in full sunlight, but it will grow in dappled shade, too. It will even thrive in poor soil and spells of drought.
One thing to note: once you’ve picked out a place in your garden for yellow wild indigo and settled it into the soil, don’t move it. The tap root is delicate, and you risk damaging the plant.
Yellow wild indigo flowers look similar to lupins, lasting for two to three weeks at a time, all the while attracting pollinators into your garden. These long-lived plants reach up to 90cm tall, and don’t suffer from any specific diseases, and tolerates garden which see a lot of deer.
It’s important to note that this plant does have some toxicity, especially to livestock.
Yellow Wood Sorrel
A member of the oxalis family, yellow wood sorrel, lemon clover, or sheep weed, is an interesting plant that mainly hails from North America.
This plant is considered a weed by most gardeners, as it infiltrates lawns, fields, and gardens with abundance.
However, it does have its uses, especially when planted in pots.
It likes moist soil, but not soggy, and needs lots of sun. These plants tend to grow quickly, reaching roughly 20 inches tall at the most.
It flowers from summer into fall in bright yellow, contrasting well against the heart-shaped, clover-like foliage.
These flowers are followed by banana-shaped seed pods.
