Roots of a tree

Contents

Suppliers of Magnolias

Magnolia cylindrica

This list is provided by Magnolia Society International as a general guide to nurseries offering a wide or unusual selection of magnolias. Inclusion on this list does not imply recommendation of any specific nurseries by Magnolia Society International.

“Mail-order” indicates the nursery will sell and ship plants directly to the buyer (check with the nursery to determine if there are restrictions on shipping); “retail” refers to nurseries selling plants to the general public only at the nursery site; “wholesale” means plants are sold to retail, industrial, commercial, institutional, or other nursery/garden/landscape professionals.

Corrections, comments, or nurseries wishing to be sent to our webmaster. This list is organized by region:

North America | Europe | Australasia

Beaver Creek Nursery, Inc.

Briggs Nursery, LLC

Broken Arrow Nursery

Camellia Forest Nursery

Cistus Nursery

Durio Nursery

Forestfarm

Garden Delights Nursery

Garden*Hood

353 Boulevard SE
Atlanta, GA 30312, USA
Phone: (404) 880-9848

Gossler Farms Nursery

1200 Weaver Road
Springfield, OR 97478-9691 USA
Phone: (541) 746-3922
Fax: (541) 744-7924

Greer Gardens Nursery

Heritage Seedlings, Inc.

Klehm’s Song Sparrow Farm and Nursery

13101 East Rye Road
Avalon, WI 53505 USA
Phone: (800) 553-3715

Low Falls wholesale Nursery

Mail-Order Natives

Nurseries Caroliniana

RareFind Nursery

Reimer’s Nurseries, Ltd.

Rivendell Nursery

Superior Trees, Inc.

Taylor’s Nursery

Top Tropicals Botanical Garden and Nursery

47770 Bermont Rd
Punta Gorda, FL 33982 USA
Phone: (941) 575-6987

mail-order, retail and wholesale

Wavecrest Nurseries

Wayside Gardens

1 Garden Lane,
Hodges, SC 29695-0001 USA
Phone: (800) 213-0379

Weston Nurseries, Inc.

Whitman Farms

Woodlanders, Inc.

Europe

Bambus centrum Kastner

architektura okrasných zahrad
Vlastimil Kastner
273 75 Třebíz u Slaného
CZECH REPUBLIC
Phone: 00420 603 244 941

Bulk Nursery

Burncoose Nurseries

Eisenhut Reto

Junker’s Nursery Ltd

Higher Cobhay
Milverton
Somerset
TA4 1NJ, ENGLAND
Phone: 44-1823-400075

Kevin Hughes Plants

Linudden Tradgard

Lunaplant.de

Mallet Court Nursery

Pan-Global Plants

The Walled Garden
Frampton-on-Severn
Frampton Court
Gloucestershire GL2 7EX
UNITED KINGDOM
Phone: 01452-741641
Mobile: 07801-275138

Pépinière Bonnivers

arbres et arbustes
Street Fize-Fontaine, 48
Chapon-4537 Seraing
BELGIUM
Fax: 00 32 19 32 71 13
e-mail: [email protected]
mail-order; retail

Piet Vergeldt Nursery B.V.

Horsterdijk 101
5973 PM Lottum
THE NETHERLANDS
Phone: 0031773663430
Fax: 0031773662758

mail-order; cannot ship to USA

Plantekassen

Jægersborg Alle 172
2820 Gentofte
DENMARK
Phone: 45-39658213
Fax: 45-39657225

retail; no mail-order

Plantentuin Esveld

Ruud van der Werf Nursery

Lansing 23a
2771 BK Boskoop
THE NETHERLANDS
Phone: +316 542 855 92
Fax: +31 172 211 724

Starborough Nursery

Stolpens Trädgård

Szkółka Krzewów Ozdobnych Zymon (Zymon Ornamental Nursery)

VIVAI PIANTE MASETTI SABINO S.S.A.

Via bassa della Vergine, 216
51100 PISTOIA – ITALIA
tel. 0039 (0)573 380404
fax 0039 (0)573 985028

Zahradnictví SAFRO

Zahradnictví Milan Havlis

Zetas Finsmakarens Trädgård

Zwijnenburg, Pieter Jr.

Australasia

Tikitere Gardens

104 State Highway 30, RD 4
Rotorua 3074
Phone/Fax: 07 345 5036

Stepping Stones Nursery Ltd

P.O Box 3195
Fitzroy 4312
New Plymouth
NEW ZEALAND
Phone: +64 6 754 8698
Fax: +64 6 754 8699

Yamina collectors Nursery

34 Mt. Pleasant Rd
Monbulk, 3793
Victoria
AUSTRALIA
Phone: 03 9756 6335 or 0438 018 618
Fax: 03 9752 0308

retail; wholesale

Trees To Avoid

To minimise maintenance and hard work, it is very important to seek advice before you plant. Any plant (whether it be a tree, shrub, climber or ground cover) in the wrong place can ruin your garden, damage your house and even cause problems with the neighbours. Here is Don’s list of problem trees, and he’s also thrown in a few invasive climbers and shrubs for good measure!

Camphor laurel (Cinnamomum camphora)

From China, Taiwan and Japan this evergreen tree grows up to 18 metres (60’) high and nine metres (30’) wide. It self-seeds readily and has become a serious weed in rainforest areas of Australia.

Evergreen figs (Ficus sp.)

Many evergreen figs start out as indoor plants and then when they get too big, they are planted out in the garden. They include Hill’s weeping fig (Ficus microcarpa var. hillii) weeping fig (F. benjamina), Moreton bay fig (F. macrophylla) and Port Jackson fig (F. rubiginosa). Planted in the garden, these figs develop into huge trees, with invasive roots that crack water pipes and damage foundations.

Evergreen alder (Alnus acuminata)

Also known as A. jorullensis, these trees are not suitable for small backyards as they grow to a massive size. The roots will break pipes, jack up fences and cause paving to buckle. The canopy quickly spreads across a small yard, blocking the light, while the roots use up all available soil space.

Weeping willow (Salix babylonica)

These are very adaptable trees and will easily multiply by layering, or form roots from any part of a stem or branch. They also have a strong suckering habit. Some councils include this tree in their weed list.

Poplar trees (Populus sp.)

As a group, poplars are a bit of a worry. They should not be planted near houses. In humid coastal areas, a disease called Poplar Rust controls the trees and is therefore not such a problem. Poplars love deep moisture and the roots will travel long distances to hunt out moisture. They are notorious for blocking drains and lifting paving. Some species sucker freely from the roots.

Liquidambar (Liquidambar styraciflua)

Liquidambars are large, fast-growing trees that can reach 25 metres (82’) high and spread to around 12 metres (39’). Although liquidambars are beautiful trees, they do have strong, aggressive root systems. If a liquidambar is planted too close to storm water pipes, the root system may completely clog the pipes.

Golden robinia (Robinia pseudoacacia ‘Frisia’)

This was a vogue tree in Australian gardens in the 1980s and it is still tremendously popular today. However, they are prone to suckering because the variety is grafted onto a vigorous understock, R. pseudoacacia, also known as the false acacia. The false acacia will grow to 20 metres (60’), has green leaves and thorns. If roots are damaged, i.e. by a mower or whipper snipper, or if the roots hit an obstacle, such as heavy clay soil, they will produce suckers that may turn up several doors down from the original tree. Any stress may also induce suckering. Suckers are very difficult to control once they start appearing. They should be cut off with a clean sharp cut as close as possible to the root.

Jasmine (Jasminum polyanthum)

This vigorous evergreen climber from China grows quickly to a height of 6 metres (20’). It can become invasive very quickly. It is difficult to control as it spreads above and below ground and the wiry stems are quite tough to remove. It sends out new shoots from the roots and can only be controlled with continual spraying.

Bog sage (Salvia uliginosa)

This upright, branching perennial from South America produces long racemes of sky blue flowers in summer. It may reach 1 -1.8 metres (3-6’) and continues to send out underground rooting shoots that may become invasive in good or moist soils.

Australian indigo (Indigofera australis)

This evergreen Australian native grows to 1-1.8 metres (3-6’). It produces pink flowers followed by brown seed pods. This plant tends to sucker and can be invasive in the garden.

Golden bamboo (Phyllostachys aurea)

There are two forms of bamboo – running (monopodial) and clumping (sympodial). Running bamboos such as the golden bamboo spread so successfully that they soon invade areas where they are not wanted. If you really want to plant bamboo, plant a clumping species.


Further information

Always seek information before you plant. Horticulturists at your local nursery can advise on suitable trees for your climate and situation.

Magnolia Root System – Are Magnolia Roots Invasive

Nobody can deny that magnolia trees in bloom are a glorious sight. Magnolias are so commonly planted in warm regions that they have become almost emblematic of the American South. The fragrance is as sweet and unforgettable as the huge, white blossoms are lovely. Although magnolia trees are surprisingly low maintenance, magnolia tree roots can cause problems for a homeowner. Read on to find out the type of magnolia tree root damage to expect if you plant these tree close to the house.

Magnolia Root System

Magnolias, like the glorious southern magnolia (Magnolia grandiflora), the state tree of Mississippi, can grow to 80 feet tall. These trees can have a 40-foot spread and a trunk diameter of 36 inches.

You might think that magnolia tree roots head straight down in order

to stabilize these big trees, but that is far from the truth. The magnolia root system is quite different, and the trees grow large, flexible, rope-like roots. These magnolia tree roots grow horizontally, not vertically, and stay relatively close to the soil surface.

Because of this, planting magnolias near houses can lead to magnolia tree root damage.

Planting Magnolias Near House

Are magnolia roots invasive? The answer is yes and no. While the roots are not necessarily invasive, you may get magnolia tree root damage when the trees grow too close to your house.

Most tree roots seek a water source, and magnolia tree roots are no exception. Given the flexible roots and the shallow magnolia root system, it is not difficult for magnolia tree roots to head for cracks in your plumbing pipes if the tree is planted sufficiently close to the house.

Most tree roots do not actually break water pipes very often. However, once the pipes fail at the joints due to aging of the plumbing system, the roots invade and block up the pipes.

Remember that the magnolia root system is very wide, up to four times the width of the tree canopy. In fact, magnolia tree roots spread farther than those of most trees. If your house is within root range, the roots can work their way into pipes under your house. As they do, they damage your home’s structure and/or plumbing system.

Mistakes to Avoid when Growing a Magnolia

The varying species of the magnolia tree make the magnolia a plant that has many different varieties suited for many different regions, climates and circumstances. No matter which species you choose to go with, you are sure to have a wonderfully beautiful plant that will add volumes to any garden space. Magnolias are fairly easy plants to care for and do not attract many pests, these factors coupled with the variety available, make the magnolia an ideal garden plant. This guide will show you some common mistakes to avoid when growing magnolias.

Location

When choosing a magnolia, it is very important to choose one that grows well in your region. Magnolias that grow in the north require different care than those native to the southern regions. If you’re in the north, the best time for planting a magnolia is the spring time, while southern magnolias do best when planted in the fall. Proper magnolia spacing is also important to avoid overcrowding and ensure the most growth. Most magnolia trees grow to be about ten to fifteen feet in width, so planting them fifteen to twenty feet apart from each other allows for the most success. Giving these plants northern exposure will help keep their budding and flowering schedules on track, giving you the best blooms possible.

Care

In the hotter months, newly planted magnolia trees need plenty of water. Under watering in the early stages of the trees life is one of the most common reasons a magnolia tree would fail. Once your magnolia tree is established, it will need far less watering and usually will only require water if the soil doesn’t hold moisture or if there happens to be a drought. Fall is the best time to fertilize your magnolias. You will want to make sure to lay enough fertilizer by laying it under the circumference of the tree and out past the tree by about one to two feet. A common mistake to avoid when fertilizing is to not lay the fertilizer all the way up to the tree trunk. You don’t want the fertilizer touching the trunk but to begin a few inches outside of the trunk. Much like with water, once your magnolia tree is well established you won’t need to continue fertilizing it so make sure you keep this in mind to avoid over fertilization.

If you are considering a magnolia companion, you should look for plants containing spring bulbs. These plants will bloom in unison with your magnolia and produce a prettier, fuller garden. Daffodils, hellebores and bluebells all work well and produce beautiful bouquets in unison with the magnolia tree.

Once you’ve got these things in mind it becomes quite easy to avoid most of the mistakes made when planting and growing magnolias. Once your magnolias are established and mature they require very little care so once you’ve passed the toughest stage of getting them established you can sit back and enjoy some of the most beautiful trees this planet produces.

How Far do Tree Roots Grow Down

Reply Robert December 20, 2010 at 11:22 am

Hello Ken,

I would recommend that you should take a look at the following resources, and share them with condo staff making the decision on new design of the sidewalks.

Typically the problem has to do with the specifications used to create a sidewalk. With proper design tree roots and sidewalks can safely coexist and properly function together.

Sincerely, Robert

1. Tree City USA bulletin #3 – Resolving Tree-Sidewalk Conflicts

2. Tripstop – Articulating Sidewalk Joint System

-Ways to Save Trees

-Construction Practices to Save Trees

3. Up By Roots, by James Urban, FASLA, ISA

Up By Roots is a manual for landscape architects, architects, urban foresters, and planners who are designing, specifying, installing and managing trees in the built environment. Part One discusses basic soil science and tree biology and their relationship to healthy trees. (Including good design concerning trees & sidewalks.)

Part Two explains the process of planning and implementing landscape designs to ensure healthy trees that can improve the quality of places where people live, work and play. The book contains numerous illustrations and data in graphic form to provide guidance in the design of healthy soils and trees.

4. ISA Journal Article – TREES ARE NOT THE ROOT OF SIDEWALK PROBLEMS

5. Rootmaker

P.O. Box 14553
Huntsville, AL 35815
Phone: (256) 882-3199

Ask Wayne Hinton about the use of Rootmaker root barrier fabric. I believe they are starting to look at this product in the design of safer sidewalks.

6. City of San Diego – Street Division – Urban Forestry

As for which types of root barrier work best…contact your San Diego Urban Forestry to see which methods work best in your community. The answer may depend on your soil type and drainage.

Drew Potocki, City Forester
(619) 527-5486

I hope these resources prove to be useful. Please let me know if you have any questions. Thank for contacting the Foundation and for caring about trees.

Sincerely, Robert

Leave a Reply

Your email address will not be published. Required fields are marked *