GardenTags Encyclopedia A-Z - Plants starting with "J"

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Jabily, Operculicarya decaryi

The Jabily is a thick stemmed succulent plant often grown as a bonsai tree. It is drought tolerant and does well in full sun in most places. It cannot tolerate freezing conditions. It grows a thick-fat trunk quickly, and its roots also swell to form unique contorted and twisted designs.

Jaboticaba, Myrciaria cauliflora

Hardy evergreen native from the highlands of Southern Brazil. Quite frost tolerant. Slow growing producing green fruit that turn black when ripe,on main trunk.

Jacaranda mimosifolia, Blue Jacaranda

This plant thrives in warm climates, sited in full sun and growing in sandy soils. Mature plants can survive in colder climates down to -7 °C, however, they may not bloom as profusely. Young plants are likely to die in such cold temperatures and should be grown in containers which can be moved in for proection in winter. In temperate climates, these are usually grown as pot plants to a height of 1M.

Jack By The Hedge, Alliaria Petiolata syn. Alliaria officinalis syn. Sisymbrium alliaria

Alliaria petiolata is a hairy biennial herb, which bears heart -shaped toothed leaves with a garlic odour especially when crushed. Terminal clusters of white 4 petalled flowers are followed by long thin seed capsules from 20-70mm in length. This plant thrives in damp soil in shade. Can be used to flavour food.

Jack Fruit, Artocarpus heterophyllus

Artocarpus heterophyllus - orJackfruit - is an evergreen fruiting tree native to Borneo, Palawan, and Mindanao Island. It bears long leaves 4-25 x 2-12 cm. fruit weighing 4.5-5.0 kg that contain the true fruits that are yellow, and aromatic, commonly known as breadfruit

Jack Monkey Flower, Mimulus 'Jack'

Most of the species are annuals, herbaceous perennials or small shrubs. Patterns on the flowers give them the appearance resembling the grinning face of a monkey. The mimulus will freely flower in the spring. Trailing varieties are available and if grown in a bed, it will produce a mound of flowers, usually around 80 to 90 cm high. Plant in a moist, humous rich soil. 'Jack is a small shrub with dark green glossy leaves and numerous deep burgundy red flowers. It is hardy to about 20 degrees F.

Jack O'Lantern Pumpkin, Cucurbita Maxima 'Jack O'Lantern'

Squashes are used as vegetables, but are, strictly speaking , fruit. They come in many forms - and there are Summer varieties as well as Winter varieties. Most squashes grow on vines, but a few in a shrubby form. They are all relatively easy to grow. Pumpkin 'Jack O'Lantern' is the perfect carving pumpkin for Hallowe'en, being large and nearly spherical. The flesh is good for soup, pies etc., as well. The pumpkins will store well if cut with some stalk attached

Jack Pine, Pinus banksiana

Pine trees are evergreen, coniferous resinous trees. Some can grow to 80 m tall, with the majority of species reaching 15–45 m tall. The smallest are Siberian dwarf pine and the tallest is a 82m tall ponderosa pine located in the Rogue River-Siskiyou National Forest. Jack Pine is a small to medium sized conifer that grows to 18m tall. It is a scraggly tree with a somewhat pyramidal shape that becomes open and irregular with age. If grown in shade, the lower branches often die but remain on the tree. Cones are curved, face forward along the branch and are often retained for several years.

Jack-go-to-bed-at-noon, Tragopogon pratensis

Tragopogon - salsify - is a hardy biennial root vegetable in the dandelion family, usually grown as an annual. It is also known as the oyster plant, because when cooked it has an oyster taste.The root somewhat resembles a long thin parsnip, with thick skin and creamy-white flesh that can be used in the same way as any root vegetable. Tragopogon pratensis is not usually grown for it's edible root. It is a wild-flower - but the root is edible. It has a yellow dandelion-like flower which closes at the first sign of bad weather, and usually anyway by noon - hence the common name of Jack-go-to-bed-at-noon

Jack-in-the-pulpit, Arisaema triphyllum

Arisaema triphyllum is a perennial plant growing from a corm. It is a variable species typically growing 65cm in height with three-parted leaves and flowers contained in a spadix that is covered by a hood. The outside of the hood is usually green or purple and the inside is usually striped purple and greenish white, though many colour variations exist. Grow in moist but well-drained humus-rich soil in a cool site, although it should not be too dry in summer.

Jackmanii Clematis 'Purpurea', Clematis x jackmanii 'Purpurea'

A group 3 climber producing deep violet flowers which average 10 cm in size. Flowers on new wood. Group 3 clematis includes the varieties that start their flowering after mid-summer and continue well into Autumn or even into early winter, if it's mild. So-called herbaceous clematis are also included in this group. These varieties like to be cut back hard in late winter. Stems are pruned just above healthy pairs of buds about 12 - 18 inches above the ground. Group 3 clematis can be pruned at the start of winter as the old stems are of no further use. However, this practice is only advisable in very sheltered positions. Mild winter spells can produce active shoots which can then be hit by frosts.

Jack-O'-Lantern Mushroom, Omphalotus olearius

A mushroom is the edible fruiting body of a fungus. The edible part consists of a cap, gills and stem, and some grow above ground, some below ground. Care should be taken with identification, as some mushrooms are toxic. 'Jack-O'-Lantern is a POISONOUS orange gilled mushroom that is somewhat similar in appearance to a some chanterelles, except that Jack-O'-Lanterns have true, sharp, non-forking gills, .It is said that the gills of Jack-O'-Lanterns are luminescent, glowing blue-green in the dark. It is a common mushroom east of the Rocky Mountains in Autumn

Jacobaea maritima syn. Senecio cineraria, Silver ragwort

Jacobaea maritima is widely grown for its silvery foliage. It is winter-hardy, to -15 °C, tolerant of light shade but preferring full sun. In colder areas it is grown as an annual plant.

Jacobean Lily, Sprekelia formosissima syn. Amaryllis formosissima

Sprekelia formosissima is a bulbous perennial from Mexico, and can be planted and grown outdoors in warmer climates, or grown in pots in colder climates and brought under cover over winter. Sprekelia formosissima produces bright red flowers with narrow petals, with long anthers, and has strap-like green foliage.

Jacob's Coat, Acalypha wilkesiana forma circinata

Acalypha is a tropical plant, grown as a houseplant, or as an annual outdoors in temperate zones. Some varieties are grown for their foliage, which can be multi-coloured, and some are grown for the often brightly-coloured catkin-like flowers. If grown outdoors the plants like full sun or part-shade, and fertile, moist but free-draining soil. Indoors they should be grown in a soil-less, free-draining compost in filtered light. Acalypha wilkesiana forma circinata - Jacob's Coat - has ruffled leaves that are edged in saw-toothed creamy yellow

Jacob's ladder, Polemonium 'Sonia's Bluebell'

Polemonium 'Sonia's Bluebell' is a deciduous, clump-forming, perennial with ovate dark green foliage.It bears clusters of scented,bell-shaped blue flowers.

Jacob's Ladder, Polemonium

Jacob's Ladder 'Bambino Blue', Polemonium caeruleum 'Bambino Blue'

Jacob's Ladder 'Bressingham Purple', Polemonium 'Bressingham Purple'

Polemonium, or Jacob's-ladder, is native to cool temperate to arctic regions of the Northern Hemisphere. It has lance-shaped leaves and lilac or white coloured flared cup-shaped flowers in Spring and Summer. 'Bressingham Purple' is a lovely plant with purple leaves sprouting from long tall stems all season producing purple-blue flowers through Spring and Summer. A sweet little plant that flowers earlier than many perennials

Jacob's Ladder 'Brise d'Anjou', Polemonium caeruleum 'Brise d'Anjou'

Polemonium, or Jacob's-ladder, is native to cool temperate to arctic regions of the Northern Hemisphere. It has lance-shaped leaves and lilac or white coloured flared cup-shaped flowers in Spring and Summer. 'Brise d'Anjou' is clump-forming with upright stems bearing creamy-edged foliage. From late spring until mid-summer it has clusters of bell-shaped, violet-blue flowers.

Jacob's Ladder 'Heaven Scent', Polemonium 'Heaven Scent'

Polemonium, or Jacob's-ladder, is native to cool temperate to arctic regions of the Northern Hemisphere. It has lance-shaped leaves and lilac or white coloured flared cup-shaped flowers in Spring and Summer. 'Heaven Scent' has loose clusters of lightly scented, blue flowers over bronze-tinged foliage

Jacob's Ladder 'Heavenly Habit', Polemonium boreale 'Heavenly Habit'

Polemonium, or Jacob's-ladder, is native to cool temperate to arctic regions of the Northern Hemisphere. It has lance-shaped leaves and lilac or white coloured flared cup-shaped flowers in Spring and Summer. 'Heavenly Habit' bears loads of violet-blue, starry flowers, each with a white eye. Blooms appear over a long season.

Jacob's Ladder 'Jacob's Gold', Polemonium reptans 'Jacob's Gold'

Polemonium, or Jacob's-ladder, is native to cool temperate to arctic regions of the Northern Hemisphere. It has lance-shaped leaves and lilac or white coloured flared cup-shaped flowers in Spring and Summer. 'Jacob's Gold' is a variegated variety which sports masses of lavender blue, bell-shaped flowers. The leaf edges of this clump-forming perennial fade to pale yellow or white in late summer and hot weather.

Jacob's Ladder 'Kaleidoscope', Polemonium yezoense 'Kaleidoscope'

Jacob's Ladder 'Purple Rain', Polemonium yezoense 'Purple Rain'

Polemonium, or Jacob's-ladder, is native to cool temperate to arctic regions of the Northern Hemisphere. It has lance-shaped leaves and lilac or white coloured flared cup-shaped flowers in Spring and Summer. Polemonium yezoense 'Purple Rain' is an unusual form, having small dark leaflets, and little starry blue flowers

Jacob's Ladder 'Stairway to Heaven', Polemonium reptans 'Stairway to Heaven'

Polemonium, or Jacob's-ladder, is native to cool temperate to arctic regions of the Northern Hemisphere. It has lance-shaped leaves and lilac or white coloured flared cup-shaped flowers in Spring and Summer. 'Stairway To Heaven' produces clumps of delicate variegated foliage and light blue flowers in mid to late spring. The cream edged leaves are heat tolerant and develop a lovely pink tinge when grown in full sun.

Jacob's-ladder, Polemonium caeruleum

Polemonium caeruleum, or Jacob's-ladder, is native to cool temperate to arctic regions of the Northern Hemisphere. It has lance-shaped leaves and lilac or white coloured flared cup-shaped flowers in Spring and Summer.

Jade Hahnii, Sansevieria trifasciata 'Hahnii'

Sansevieria are flowering plants native to Africa, Madagascar and southern Asia, and grown as houseplants in cooler climes. They do well with warmth and bright light, but will also tolerate shade. It is important that they are grown in well-draining compost and not over-watered, or they may rot. One of the most distinctive of the Hahni group as the foliage displays no markings or chevrons on the gorgeous deep jade surfaced thick substanced leaves of deep mahogany green. The pointed leaves thickly overlap to form tight upright cups.

Jade Necklace, Crassula rupestris subsp. marnieriana

Crassula are succulent, herbaceous plants. Some varieties are suitable for rock gardens in mild regions as long as the soil is well drained. The thick leaves are often covered with hair or 'meal' and the flowers are generally small in size and borne on terminal panicles. Crassulas can easily be grown from leaf cuttings. 'Marnieriana' is a small, slow growing plants up to eight inches tall. Leaves are green with red edges, thick, rounded and tightly stacked along the stem.

Jade Plant, Crassula ovata syn. Crassula argentea, Crassula portulacea,Crassula obliqua,Crassula articulata,Crassula nitida,Crassula lucens.

The jade plant is an evergreen with thick branches. It has thick, shiny, smooth, leaves that grow in opposing pairs along the branches. Leaves are mid to dark green. Some varieties can develop a red tinge on the edges.It is common as a houseplant worldwide

Jade Plant, Crassula ovata 'Convoluta'

Crassula 'Convoluta' is a type of jade plant or money tree that is slightly more compact that the standard Crassula ovata. Crassula are succulent, herbaceous plants. Some varieties are suitable for rock gardens in mild regions as long as the soil is well drained. The thick leaves are often covered with hair or 'meal' and the flowers are generally small in size and borne on terminal panicles. Crassulas can easily be grown from leaf cuttings.

Jade Plant Max Cook, Crassula undulatifolia 'Max Cook'

Crassula are succulent, herbaceous plants. Some varieties are suitable for rock gardens in mild regions as long as the soil is well drained. The thick leaves are often covered with hair or 'meal' and the flowers are generally small in size and borne on terminal panicles. Crassulas can easily be grown from leaf cuttings. 'Max Cook' is a compact succulent with attractive grey/green wavy leaves. Looks stunning in a pot or as a clump in the center of a succulent garden.

Jade- Red Tipped Bonsai, Crassula Ovata Bonsai

Bonsai is ancient tradition of the Japanese for growing miniature trees or shrubs in containers. They are literally just a miniature form of the real thing. They can be shaped and made to look older than their years. Although size, ph, light requirements and frost hardiness have been given here, each of these actually depends on the requirements of the type of tree or shrub grown. Jade trees need plenty of light and sunshine, and temperatures no lower than 50 deg. F. They need to be watered and then the soil allowed to get nearly dry before they are watered again, and must be grown in a free-draining medium. Cactus compost is suitable. Fertilise once every two weeks or so.

Jade Vine, Strongylodon macrobotrys

A vigorous woody tropical climbing vine that can grow up to 18m long. Trifoliate dark green leaves measuring up to 25cm long with stunning jade green to aquamarine pendulous flowers. Each individual bloom resembles a stout-bodied butterfly with folded wings

Jagged Lavender, Lavandula Pinnata Var Buchii syn. Lavandula Buchii

Lavender produces a thick bush of fragrant purple flowers. Drag your hand across Lavender and you get hit by its unmistakable aroma. The foliage is a distinctive silvery sage like colour that's a great additional to any flower bed. It grows equally well in pots. If you place it on a window-sill you'll get lots of great fragrance wafting into the house during the summer months. Lavender is bee friendly so we can't encourage you enough to grow this wonderful plant. 'Jagged Lavender' has feathery, fern-like foliage and short winged spikes of blue-purple flowers

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