Six Native Plants For Your Garden.

SIX FLOWERS: Native to Nova Scotia’s Acadian Forest that are excellent for pollinators. Information is selected from William Cullina’s book Wildflowers; A Guide to Growing and Propagating Native Flowers of North America.

“There is value in preserving wilderness, but there is equal value in restoring the suburbs and cities where most of us live to something closer to balance, for our children’s sake and the sake of all the other species around us.”

-William Cullina

1. Turtlehead, Chelone Glabra

LIGHT- Part sun

SOIL- Moist to wet

HIGHT- 3 feet

COLOUR- white

BLOOM- from late summer to fall.

WILD LIFE- Nectar plants. White turtlehead is one of the two larval food plants for the lovely orange and brown Baltimore checker spot, euphydryus phaeton,

PROPAGATION- Easy from seed or cuttings.

“Although turtle heads are found in wet locations in the wild, they adapt well to average garden soils as long as drought can be avoided. They divide and transplant readily, and once established are virtually trouble free.”

2. New England Aster, Aster novae-angliae

LIGHT- Part sun

SOIL- Moist

HEIGHT- 2-6 feet

COLOUR- violet to purple or rose

BLOOM- fall

WILDLIFE- Asters are one of the most important fall nectar plants, and a patch of flowering plants seems to attract any and all the pollinators in the area, frantically trying to gather the last of the season’s bounty. A number of asters are also important food plants for butterfly larvae. Many of the crescents feed on asters.

PROPAGATION- Generally easy from seed.

One of the showiest and most often cultivated of the larger asters. Forms thick clump after a few years.

3. Swamp Milkweed, Asclepias Incarnata

LIGHT- Sun, pat shade

SOIL- Moist to wet

HEIGHT- 2-4 feet

COLOUR- white and pink

BLOOM- summer

WILDLIFE- Excellent nectar plants, food for the larval stage of the monarch and queen butterflies.

PROPAGATION- Easy from seed.

“One of the our widest ranging and showiest species with flattened, brightly coloured flower heads at the tips of tall stems. Although found in wet soils, it will thrive in the garden if soil is not droughty. Strongly clumping.”

4. Bone set, Eupatorium perfoliatum

LIGHT- Sun, part sun

SOIL- Moist to wet

HEIGHT- 2-4 feet

COLOUR- white

BLOOM- late summer

WILDLIFE- Excellent nectar plant

PROPAGATION- Easy form seed or cuttings.

Makes an excellent garden plant, with interesting foliage and hazy masses of purple or white flowers that are absolute favorites of butterflies and bees. They are tough, easy plants for range of soils and uses, and no wildflower garden would be complete without one or two. Size and presence that rivals any shrub and smoky lavender flower heads that can be as big as basketballs on 6-foot stems.

5. Cardinal Flower, Lobelia Cardinalis

LIGHT- Sun to light shade

SOIL- Moist to wet, acidic to neutral

HEIGHT- 2-4 feet

COLOUR- crimson, occasionally white or pink blooms late summer

WILDLIFE- Excellent nectar plants. Both are very attractive to hummingbirds.

PROPAGATION- Easy from seed or cuttings

6. Giant Sunflower, Helianthus giganteus

LIGHT- Sun, part sun,

SOIL- Moist to wet

HEIGHT- 6-10 feet

COLOUR- disk yellow, rays pale to strong yellow

BLOOM- fall

WILDLIFE- Nectar, also larval food. Seed head are excellent for birds.

BOOKS

Cullina, W. (2000) Wildflowers; A Guide to Growing and Propagating Native Flowers of North America. Houghton Mifflin

Sanders, J. (2003) The Secrets of Wildflowers: A delightful feast of little-known facts, folklore, and history.  The Lyons Press

Johnson, Lorraine. (2011) 100 Easy-To-Grow Native Plants: For Canadian Gardens. Whitecap Books

Tallamy, D. Bringing Nature Home: How You Can Sustain Wildlife with Native Plants. Timber Press.


Practicing Safer Soil: Growing in the City

When you are planning a new garden in the city it is important to consider the health of your soil. Because of industrial practices over the years, natural soil chemistry, motor vehicle emissions, and lead and zinc in old house paint for example, some of our city’s soil is contaminated. So when you are ready to start planning your new garden, it is important to test your soil for common contaminates so that you can have a clear idea of the health of your soil and make informed decisions that feel safe for you and your community. This post will explain a little more about how to test your soil, and how to plan your garden accordingly.

Soil that is considered contaminated is soil which has levels of a particular element (such as lead or arsenic), that are higher than the Canadian Council of Ministers of the Environment (CCME) guidelines for agricultural use.

There are two kinds of soil tests. The first is to test your soil for its nutrient contents, and the second is to test for heavy metal contaminants. Here is a little bit of information about how, when and when to do each of these tests.

Nutrient Testing

The Nova Scotia Soil testing Lab, located at the Nova Scotia Agricultural College, will test your soil for organic matter, acidity and other essential nutrients (but not heavy metals). This test will help you decide how much compost you need to add, as well as other soil amendments to boost the fertility, neutralize the pH and condition your soil. 

When To Sample

Soil sampling should be done in the fall, after the crop has been removed. Sampling in the early spring, when the water level is high, can cause misleading analysis, especially for pH and lime requirement. In order to be sure that you get the proper analysis for your soil, they must know what you are (or are hoping to) grow.

How to Take a Soil Sample

Step 1: Obtain soil sample boxes and sample submission forms from the local field office of the Nova Scotia Department of Agriculture or from the Quality Evaluation Division, Laboratory Services in Truro.

Step 2: Take a garden trowel and go down 12 to 15 centimeters (5 to 6 inches) in 6 to 10 different areas of your garden or flower bed.

Step 3: In a clean bucket or pail, empty the contents of each area. Remove plant debris. After you have done this, mix the soil together.

Step 4: From this mixture, take a 500 mL (2 cup) sample. This sample will be a good representation of the garden or flower bed soil.

Step 5: Place the 500 mL (2 cup) sample into the box. If you do not have a soil box, a freezer bag that can hold the full sample of soil can be used.

Step 6: When you receive your soil test results, consult your local agricultural representative or specialist about recommendations.

Payment and Shipping

Cost is $20.50 per sample + Disposal fee + HST.  A cheque or money order made out to the Nova Scotia Department of Agriculture must accompany the soil sample. If you are mailing the sample, please address your package to:

176 College Road, Harlow Institute
Truro, NS   B2N 2P3

Heavy Metal Contaminants Testing

You can get your soil tested for various contaminants if you are worried about or unsure of the health of your soil. In Halifax you’d likely want to test for Lead, Arsenic, Copper and Zinc.

Where to Send Your Sample

Daniel Chevalier,                                                                              

Manager, Minerals Engineering Centre
Dalhousie University
1360 Barrington Street
GH Murray Building, Room G101
Ph: (902) 494-3955

AGAT Laboratories                                                                               

11 Morris Drive
Dartmouth, Nova Scotia
Tel 902-468-8718
Fax 902-468-8924
Toll Free 1-888-468-8718

MAXXAM Labs                                                                                                       

200 Bluewater Rd., Suite 105, Bedford, NS B4B 1G9
Tel: (902) 420-0203 or (902) 832-4852
Toll Free: (800) 565-7227

Reading Your Results

The CCME soil quality guideline for agricultural land, is a baseline for what acceptable levels of each of these metals are in your own garden. These are all measured in parts per million (ppm) and are as follows:

 

Arsenic

Copper

Lead

Zinc

Maximum acceptable concentration for agricultural lands – ppm

12

63

70

200

pH measures if your soil is acidic, alkaline or neutral, indicated by numbers from 0-14 with 0 being extremely acidic and 14 being extremely alkaline (“basic”). Most plants prefer a neutral soil, somewhere in the range of 6 – 7. Keeping your pH neutral helps to make nutrients available to your plants, it also helps to “lock-up” heavy metals in your soil, making them less available to your plants.

Organic matter refers to the plant and animal materials that exist in the soil. It is important to be constantly adding organic matter to improve soil structure and replace micronutrients that plants need to thrive. According to Nova Scotia Department of Agriculture, a good organic matter concentration is greater than 3.5%.

Gardening in Contaminated Sites

If you’re not sure, or you know that your site is contaminated, you can build raised beds and bring in clean soil from elsewhere. There are lots of ways to do this:  building a box at least 6 inches high out of scrap wood or stone tiles and laying a sheet of landscaping cloth along the bottom. Food-safe plastic buckets salvaged from grocery stores also make great container gardens. 

If you’d rather work with the soil that already exists on your site, there are lots of ways to reduce possible health risks. We reached out to professionals and urban farmers across Canada and the United States to ask their opinion on mitigating the risks of contaminated soils, and together came up with the following recommendations:

  • “Eating dirt” is by far the most significant way that heavy metals enter the human body. Wear gloves if possible, especially if you’re gardening with children. Clean your hands afterwards and wash produce carefully.
  • Avoid weeding on very dry days, or use the “chop-and-drop” method where you cut young weeds just above the soil and let the greenery fall to the ground as mulch.
  • Since a little soil sticks to roots, peeling root vegetables and growing lots of leafy greens and fruits is a good approach, just wash them before you eat them. 
  • Last but not least, adding organic matter to your soil reduces the amount of contamination that is taken up by your body and dilutes what exists in the soil.  Similarly, adding wood ash, lime, or egg shells to make the soil less acidic reduces heavy metal absorption in humans. These things also help your Nova Scotian garden grow!  

For more information on heavy metal contamination you can read our Community Garden Heavy Metal Contamination Study (2011).

Written by: Garity Chapman

Garden Gossip: How to Find Out What is Happening

It may not feel like it but spring is just around the corner and the city is abuzz with gardening workshops and events. Its not always easy to stay in the know, but here are two great local resources to help keep all the action straight.

Halifax Garden Network Website and Calendar

It is easy to find out all that is happening by visiting the Halifax Garden Network Events Calendar. Click on a listing to see everything you need to know about the event and who to get in touch with to participate or register. 

GardenHalifax Listserve

If you’d like annoucements delivered straight to your inbox, sign up to the GardenHalifax email listserve to hear what other urban gardeners are up to and how to get involved. You can subscribe by emailing gardenhalifax-subscribe@lists.riseup.net (and un-subscribe by emailing gardenhalifax-unsubscribe@lists.riseup.net).

These events are great chances to meet other gardeners in your area, learn and new skill and ask some questions. We are all learning so don’t be shy.

Written by: Garity Chapman