Browsed by
Category: About Trees

Articles involving trees, shrubs, bushes, woods and hedges plus related subjects

Grow Bright Azaleas

Grow Bright Azaleas

A lazier shrub with exciting blossom I have yet to find.
Azalea

How do you tell an Azalea from a Rhododendron? Most Azaleas have only 5 or 6 stamen while most rhododendrons have 10 stamen. Azalea leaves tend to be thinner, softer and more pointed than rhododendron leaves.
In a subjective way I think Azaleas produce more flower cover per plant.

Tips for Growing Azaleas

  • Azaleas are relatively pest-free  and easy to grow plants but may need a fungal spray if leaves are attacked in spring.
  • Azaleas like some shade  but deciduous varieties do well in full sun. Sun can produce more compact plants with more blooms but not as long lasting.

Read More Read More

Tips Growing Scented Lilacs Species and Hybrids

Tips Growing Scented Lilacs Species and Hybrids

lilac

Lilacs (Syringa vulgaris ) are one of the most rewarding spring or early summer flowering shrubs. It rewards us with the most delicate fragrance and beautiful flowers. Even when not in flower, the lilac makes a nice attractive deciduous, green leaved shrub, that can form part of a hedge or shelter the garden.

Tips for Growing Lilacs

  • Lilacs do not like waterlogged soil. It is important to plant in a relatively free draining soil.
  • They can tolerate hot sun and heat (and can provide a nice dappled shade for the rest of the garden.
  • In long periods of drought, it may be necessary to water. Make sure the water gets deep down.
  • Lilacs are not heavy feeders. In good soil, a general purpose fertilizer once a year, will be adequate. Be wary of too much nitrogen as this can lead to green growth at the expense of blooms.
  • Lilacs send suckers from the base. These are vigorous growers and can be separated from the main bush to create new plants. A cheap and easy way to propagate.

Lilac

Lilacs Pests Problems and Diseases

  • Lilacs remain relative pest free. I have never had any aphids with my lilacs.
  • Lilacs can be subject to powdery mildew, especially when hot and humid. The best treatment for powdery mildew is removing affected leaves and burning, and treating with suitable fungicide.
  • Do not prune at the wrong time or you will stop the flowering. Lilacs should be cut after blooming.

What Lilacs to Grow

  • Common Lilac or French lilac grow about fifteen feet tall with a spread of 8-10 feet.
  • Lilacs have large clusters of flowers in a pointed cone shape. They are available in varieties with pink, white, blue, purple, flowers.
  • Korean lilacs are shorter more rounded with small leaves and extremely fragrant flowers.
  • Japanese Lilacs called Syringia reticulata generally have cream coloured flowers and grow into small treesLilac
  • Related

    Book Cover
    Lilacs: A Gardener’s Encyclopedia by John L. Fiala and Freek Vrugtman
    ‘The new book provides up-to-date information on the 21 known lilac species and 10 natural hybrids, as well as hundreds of the 2000 named cultivars.’

    Lilacs from Thompson & Morgan

Read More Read More

Elm – Root and Branch Review

Elm – Root and Branch Review

Elm tree in spring

English Elms have been dying in there millions since the 1970’s. A further outbreak of Dutch Elm disease in the 1990’s make the growing of Elm in the UK a dangerous business.

Key Features of the Elm

  • Latin name – Ulmus minor Ulmus procera other common names English Elm, Field Elm or Atinian Elm
  • Height – 100 feet
  • Type of tree – Deciduous
  • Leaves – green alternate ovate deeply toothed, slightly hairy underneath
  • Flowers – reddish petalless in clusters
  • Fruit – Small central seed surrounded by membraneous wing
  • Bark – Grey brown becoming cracked
  • Family – Ulmaceae

Origins and Distribution of the Elm

  • Not native to the UK despite being called the English Elm but probably brought over by the Romans.
  • Found in North America and Turkey.
  • Planted in parks and gardens in Australia, UK and Europe.

Uses and Attributes of the Elm

  • Durable and waterproof timber was used in waterwheels, coffins and ship building.
  • Romans used the Elm to support grape vines.

Another one bites the dust

Gardeners Tips for the Elm

  • Dutch Elm disease (DED)has ravaged the British Elms and the ‘Constable like landscapes’.
  • There is a conical variety Ulmus ‘Wredei’ that could suit a garden but I am waiting for the DED to die out .

Other types of Elm

  • Ulmus Sapporo ‘Autumn Gold’ is a fast grower and can reach its final height of 15 metres in almost the same number of years . Said to be a disease resistant Elm it is not as stately as the original. It is a hybrid of Japanese Elm and the dwarf Siberian Elm, Ulmus pumilia, and is highly resistant but not immune to DED.
  • Ulmus hollandica hybrid varieties used be common over much of Europe and Britain. They occur naturally wherever English Elms and Wych Elms Ulmus minor and Ulmus glabra respectively have a chance to interbreed but again they are susceptible to ‘DED’

Elm comments from elsewhere

  • In the 1970s a virulent strain of a fungal disease arrived on imported Canadian logs. It was spread by beetles and fanned out killing between 15-30 million trees. It was called Dutch Elm disease as that was where the research in to the cause of the trees death was done

Special Elm Trees

Read about our series on British tree reviews with a bakers dozen fact sheets
Credits
Elm tree in spring by BillLongstaff CC BY-SA 2.0
Another one bites the dust by Unhindered by Talent CC BY-SA 2.0 ‘Another elm in our neighborhood succumbs to Dutch Elm, making 5 or 6 big boulevard elms that have been removed around our corner in the last few years.
These were gorgeous old trees, which provided us with shade in the summer and shelter from January’s bitter north winds. We’re working on planting new trees, but those will be more for the next generation than ours.’
Special Elm Trees by Island 2000 Trust Conservation CC BY-NC 2.0 ‘Our elm project aims to in part replace the many thousands of English Elms lost to the Island through Dutch Elm Disease with the resistant cultivar of Wych Elm Ulmus LUTECE. We buy in and distribute between 500 and 1000 every year and we’re now in our 4th year of the scheme. The original work on LUTECE was done by Butterfly Conservation and Andrew Brookes at Portsmouth University particularly with regard to the conservation of White-letter Hairstreak. We’re on the look-out for more resistant strains too, particularly those based on English Elm.”Here are some of our special resistant LUTECE elms about to be planted out in Totland. West Wight has suffered dreadfully from the renewed outbreaks of DED since 1995 and we’re keen to do what we can to restore an elm component to the landscape. There’s still plenty of elm at a lower level in hedges and as suckers from felled or dead taller trees but there are almost none left as field and hedgerow trees. These are alongside One Horse Field (a Gift to nature Project).’

 

Rowan – Mountain Ash – Root and Branch Review

Rowan – Mountain Ash – Root and Branch Review

mountain ash

The Rowan or Mountain Ash is a member of the same family as the rose and is part of the large Sorbus genus. The trees can be quite singular in appearance when shaped by wind on high moors and mountains.

Key Features of the Mountain Ash

  • Latin name – Sorbus aucuparia other common names Rowan, Whitebeam trees or European Mountain Ash
  • Height – up to 50 feet
  • Type of tree – Deciduous
  • Leaves – pinnate with terminal leaflet andtwo rows of long, green, serrated, oblong leaflets
  • Flowers – large flat-headed clusters in creamy white. scented
  • Fruit – orange to red berries half inch diameter
  • Bark – smooth silver-grey
  • Family – Rosaceae

Origins and Distribution of the Mountain Ash

  • At home on high ground.
  • Common in the UK and Europe.

Mountain panorama with rowan

Uses and Attributes of the Mountain Ash

  • Valued for the Rowans ornamental qualities.
  • Berries are great bird food.
  • Revered by Druids, Norse and in Greek legend to ward off evil spirits
  • Rowan jelly made from the berries is a traditional ‘tart’, accompaniment to game and venison.

Rowan DSCF8583

Gardeners Tips for the Mountain Ash

  • The berries and colourful autumn leaves make this a good and hardy specimen tree.
  • Berries can vary in colour depending on the species from white, yellow, red or orange.
  • Grows well even in very acid soil but may not live as long on thin chalky soil

Sorbus

Other types of Mountain Ash

  • Sorbus is a large genus including hardy trees grown for ornamental qualities that include attractive flowers, ornamental foliage which colour richly in autumn and produce berry like fruit.
  • There are 3 sections of Sorbus; Aucuparia sorbus have pinnate leaves with numerous leaflets. Aria section have simple toothed and lobed leaves while Micromeles group are similar to Aria but have deciduous calyces.
  • Sorbus aucuparia has 5 sub species and a parent to numerous hybrids.
  • Sorbus aucuparia ‘Beissneri’ and Sorbus aucuparia ‘Fastigiata’ have an AGM.

Mountain Ash comments from elsewhere

  • ‘The rowan is also prominent in Norse mythology as the tree from which the first woman was made, (the first man being made from the ash tree). It was said to have saved the life of the god Thor by bending over a fast flowing river in the Underworld in which Thor was being swept away, and helping him back to the shore’. Trees for Life.
  • In the UK the Rowan is known as a tree associated with witchcraft, protecting people and dwellings.

Sorbus berries on mountain ash

Credits
Rowan DSCF8583 by hedgerowmobile CC BY-NC-SA 2.0
Mountain panorama with rowan by moonlightbulb CC BY 2.0
Lijsterbes by ednl CC BY 2.0

Read about our series on British tree reviews with a bakers dozen fact sheets
Lijsterbes

Leyland Cypress – Root and Branch Review

Leyland Cypress – Root and Branch Review

high trees 007

If you want a quick wind break or tall hedge then Leylandii may be the tree for you. If you to annoy the neighbors then this is the tree most likely to cause friction.

Key Features of the Leyland Cypress

  • Latin name – Leylandii x Cupressocyparis other common names; Leylandii is a cross between Nootka Cypress and Monterey Cypress
  • Height – 130 foot
  • Type of tree – Evergreen Conifer
  • Leaves – sprays of green scale-like leaves
  • Flowers – clusters at tips of leaves yellow male & green female
  • Fruit – spherical; brown cones
  • Bark – reddish grey with ridges
  • Family – Cupressaceae

Origins and Distribution of the Leylandii

  • Created in Wales by crossing Nootka Cypress and Monterey Cypress .
  • Widely spread throughout the UK by plants grown from cuttings .

Uses and Attributes of the Leylandii

  • Used in ornamental hedges and garden dividers.
  • Useful as a bird sanctuary for nesting and cover.

leyland cypress cones DSCF7563

Gardeners Tips for the Leylandii

  • Rapidly out grows its welcome in many gardens.
  • The cause of disputes over hedges and light for neighbors.
  • Leyland Cypress needs light but is tolerant of high levels of pollution and salt spray.
  • Trees do not transplant well. If the plant you are thinking of buying is pot bound leave it alone

Other types of Leyland Cypress and Cupressus species

  • Most of the Cupressus genus have a conical or columnar habit
  • There are over 30 forms of Leyland Cyprus arising from open pollination and breeding including Green Spire, Haggerston Grey and Naylor’s Blue.(one of the fast-growing, pyramidal, evergreen tree with scaly blue-green leaves held on flattened branchlet sprays. This vigorous conifer can grow over 100 feet tall, though it usually reaches around 80 feet tall and spreads 15 feet in a garden).
  • Cupressus macrocarpa are golden leaved and Cupressus funebris is a weeping form

Leylandii Sky

Leyland Cypress comments from elsewhere

  • To avoid brown patches, hedge trimming should be carried out during the growing season and hedges should not be cut into older, leafless growth. Leyland cypress can cause skin irritations..
  • Leyland cypress only lives for twenty to twenty-five years. I’ve found that trees left to grow large may have limited root support and are the first to blow down during high winds.

Read about our series on British tree reviews with a bakers dozen fact sheets

Credits

leyland cypress cones DSCF7563 by hedgerowmobile CC BY-NC 2.0
Leylandii Sky by steve_w, CC BY-NC-ND 2.0

Top 10 Spring Flowering Shrubs

Top 10 Spring Flowering Shrubs

forsythia

Spring is known for colourful bulbs and primula but there are many top shrubs that provide great colour in spring.

Forsythia The yellow flowering twiggy shrub that can grow to 10 feet. It flowers before the leaves form and is a strong, bright  yellow. Large blossom varieties are now being cultivated but either way you get a mass of bloom.

Rhododendron Evergreen shrubs of many forms and sizes from 12 inches to 12 foot. Some bloom from March and some in May. Many sizes and colors exist and one range is named after Snowwhite’s seven dwarfs.

Ribes sanguineum Red Flowering Currant 6′ by 4’  This easy deciduous shrub flowers in panicles of red  or pink  in March and April.

Mahonia aquifolium ‘Compacta’Oregon Grape Evergreen shrubs with spiky leaves grow to several feet tall. Yellow flowers in February and March with good scent. It also produces black edible berries.

Read More Read More

Skimmia for Buds and Berries

Skimmia for Buds and Berries

Variegated Skimmia Magic Marlot

Skimmia is a slow growing, aromatic, evergreen shrub with a compact habit. Skimmia Japonica grows in a dome shape with leathery leaves and the flowers can be followed by red or black berries. Skimmia laureola has dark green leaves which smell when crushed. The flowers on this variety are clustered on the end of the shoots.

How and Where Can I Grow Skimmias?

  • They are tolerant of shade and seaside conditions though some cultivars do not like an alkaline soil.
  • The flowerbuds look like pink flowers (above) and slowly develop during late autumn before finally opening to reveal the small white flowers in late winter.
  • Most Skimmias are single sex plants therefore, if you want berries (below), you will have to grow both male and female plants.
  • Skimmias are slow growing and should not need pruning
  • Plants are hardy and would fit in too a low maintenance area
  • Skimmias can be grown in containers

Read More Read More

Bonsai Lessons and Hinokicypais Obtusc

Bonsai Lessons and Hinokicypais Obtusc

Hinokicyparis obtusc

My attempts at Bonsai have not been as successful as I would have wished. After a talk and practical demonstration at our local gardening club I was fired with enthusiasm but not patience.

I bought the training pots and wired some trees two seasons ago and they look similiar to when I planted them. I was fortunate to have been shown how to take a 4 foot high tree down to bonsai size rather than growing a seedling in a pot as I had assumed you needed to do. At the Harrogate Autumn show there was another practical demonstration that also showed how to wire and twist branches to look like older drooping branches.

After another winter outside I will tidy up my attempts and have another go in Spring.  I think it would be satisfying to achieve an example similar too the one above or even something close. To do that I need a book from amazon or Santa.

Book Cover

Book Cover

Golden Winter Colour

Golden Winter Colour

Lonicera nitida Baggessen's Gold

What colours predominate in the grey winter days when greens seem muddy and mud seems very grey. Well I like golden yellow colours and here are a couple of January examples that didn’t take much trouble finding in the garden during a short sunny spell.

Lonicera nitida ‘Baggesen’s Gold’ tips you off in the title. This relative of the honeysuckle is grown for its leaf and the ability to prune to shape. It will not flower and is easy to propagate from cuttings. Unpruned the leaves can appear bicoloured but young growth will be fresh and bright golden coloured. It is easy to prune and a very forgiving shrub. Close up these small ovate leaves are not made from gold leaf unfortunately.

Tight leaf formation

Choisya ternata Sundance was another yellow shrub doing its best in the weak January sun this afternoon. If the winter is too prolonged some young yellow leaves may get slightly frost burnt but despite -8 degrees last week these shrubs are still showing well. I also like the smell of bruised leaves and the delicate white spring blossom. This golden wonder performs even in a crisp winter frost.

Choisya ternata golden sun

Read More Read More