Annual meadow-grass is an annual or short-term perennial grass found on arable land, grassland, trackways and in gardens.

Annual mercury is, as its name suggests, an annual weed. It sets a lot of seeds each year and so spreads readily around the garden.

A small bulbous perennial, the English bluebell flowers in April and May, and spreads easily in the right conditions. Bluebells will grow happily in a shady garden, and they make good spring ground cover.

Broad-leaved dock is a tall plant with very large, wavy-edged, oblong leaves that have red stems on their undersides. Flower spikes have numerous clusters of reddish-brown flowers.

Erigeron canadensis is an annual plant native throughout most of North America and Central America. It is also widely naturalized in Eurasia and Australia. Common names include horseweed, Canadian horseweed, Canadian fleabane, coltstail, marestail, and butterweed.

Chickweed — also called starweed, satin flower, or mouse-ear — is a common weed in the carnation family. It grows low to the ground, has a hairy stem, and produces small, star-shaped, white flowers.

Clovers are generally short-lived herbs and feature alternate compound leaves, usually with three toothed leaflets. The very small, fragrant flowers are crowded into dense, nearly spherical heads, or spikes and can be white, pink, red, or yellow.

Cocksfoot grass is perennial and commonly grows in dense tussocks which can be 20–140cm tall. Its key characteristic is a flattened stem base which separates this grass from others.

Cow parsley is a hollow-stemmed, tall plant that grows rapidly in the summer before dying back. It likes shady habitats in particular, and can be found decorating woodland edges, roadside verges and hedgerows with masses of frothy, white flowers. These flower umbels (umbrella-like clusters) appear from May until June.

Cranesbills are perennial plants that belong to the genus Geranium and thrive in temperate climates with cool summers and cool summer nights.

White clover (Trifolium repens) -- also so called creeping clover -- is a perennial weed that produces creeping, jointed stems. New roots and shoots grow from these joints -- or nodes -- allowing the clover to spread quickly.

A daisy is a flowering plant with a large, star-shaped head that has clusters of florets surrounding a center disc of yellow or black florets. The daisy family is also known as the aster family, or Asteraceae, referring to the star-shaped flower.

Dandelion is a short-lived perennial that will grow just about anywhere, regardless of soil conditions, but rich soil will improve its growth. They withstand frost and freezes and tolerate crowding. Heat and insufficient moisture will cause the leaves to get bitter, but it won't kill the plant.

A native plant, common to dunes and grasslands on dry sandy or calcareous soils, dove’s foot cranesbill is a member of the hardy geranium family that can prove a problem in lawns where its explosive seed pods release seeds over a wide area, quickly covering areas of lawn.

Elder has creamy-coloured, highly scented flowers. Its leaves are pinnate with 5–7 oval leaflets. Mature trees can grow to around 15m in height. It produces small, purple-black berries which are sour to the taste.

False oat-grass is a tall, fluffy-looking perennial of grasslands, roadside verges and disturbed ground. Perhaps one of the most common grasses of these often overlooked places, it may well be familiar as the grass that so many of us catch in our hands and absent-mindedly strip of its seeds as we walk along.

Looking like a small bush that grows to about 20 inches (50 cm.) high, the feverfew plant is native to central and southern Europe and grows well over most of the United States. It has small, white, daisy-like flowers with bright yellow centers. Some gardeners claim the leaves are citrus scented.

Green alkanet is a member of the forget-me-not family, Boraginaceae, and is related to borage and comfrey. Hairy stems to 80cm (32in), leaves broadly ovate and noticeably bristly. Bright blue forget-me-not type flowers with white centre, 8-10mm (½in), open from pink buds and are borne April to June.

Despite its name, Ground-ivy is actually a member of the dead-nettle family and is not closely related to Ivy. It is an evergreen, creeping plant of woodlands, hedgerows and damp ground. It often forms clumps, spreading by means of overground runners that frequently root.

Groundsel is an annual weed of cultivated or disturbed ground, popping up along field edges, roadside verges and on waste ground. Branched stems lead to open clusters of yellow flowers that can be seen most of the year, and turn to white, fluffy seed heads.

Hoary cress is an introduced, erect rhizomatous perennial found on waste ground, roadsides, railways, arable land, pasture and on sandy soil by the sea. It is often limited to hedgerows and field margins but can invade agricultural land. Hoary cress occurs on soils ranging from light sands to medium-heavy clays.

Common mallow is a handsome, large, spreading plant with beautiful deep pink flowers that appear from June to October. It can be found on roadside verges, along footpaths and on waste ground.

Ryegrasses can be annuals or perennials. The tufted plants reach about 0.3 to 1 metre (1 to 3.3 feet) tall and have tough dark green leaves. The flower spikelets grow in the angles of a zigzag rachis (flower stem). The plants have extensive root systems and are useful for erosion control.

Plantain, also known as broadleaf plantain (Plantago major), is native to Europe and certain parts of Asia. This perennial plant produces greenish flowers and has large, oval-shaped leaves that can be eaten raw or cooked. Despite sharing its name, plantain weed is unrelated to plantain fruit, which is a type of banana.

Shepherd's purse is a widespread annual of cultivated land, including fields, farmland, tracks, roadside verges and gardens. It gets its common name from its heart-shaped seed pods, which resemble little pouches that were worn by medieval peasants.

A common plant of disturbed ground like roadside verges and field edges, the spear thistle has purple, fluffy flower heads that appear in summer.

Slender speedwell (Veronica filiformis) is a low-growing plant with bright blue, long-stemmed flowers early in the year, usually March to May. It is low-growing and can form dense patches in a lawn.

Sow thistles are in the same plant family as dandelions, and they produce yellow flowers that resemble those of dandelions. Sow thistle flower stems can reach anything from 30cm (1ft) up to 2.1m (7ft) high, depending upon species and the growing conditions.

Stinging nettle (Urtica dioica) is a plant with pointed leaves and white to yellowish flowers. The root and above ground parts are used for diabetes. The stinging nettle plant is typically 2-4 meters tall.

Sold as a hardy and versatile perennial, yarrow has showy flower heads composed of many tiny, tightly-packed flowers rising above clusters of ferny foliage. The flowers may be yellow, red, pink, or any shade in between.