Dahlias are one of the easiest and most rewarding flowers to grow. One or more will give you a sense of achievement for the Summer and into Fall with a fantastic array of color.

Dahlias are of the Asteraceae family with Chrysanthemum. Sunflower and Zinnia.  They come in many variations – pompoms, globe, spiky cactus and dinnerplate(growing to 5ft and flower up to15” in size) with a rainbow of colors.European explorers discovered dahlias on the hillsides of Mexico. They are still popular in Europe today. It is said that the tubers are edible, tasting like a cross between a potato and radish.

Nurseries always have the bright colored packages of Dahlias with other Summer bulbs. They are not a bulb but a tuber. The package will show you the type and color.When you open the package, you will find a bunch of tubers like a hand usually packed in peat moss. Now this time of year it will already show you its tip as sprouts will already be forming showing which is the top.

Dig a hole deep enough to allow the growth tip to be just above the soil and wide enough to spread the ‘fingers’. Adding bonemeal is a good idea. Cover and water well. It is that simple. When planting them make sure to space at least 3ft apart if possible.Slugs may eat them if they are grown too close together. Japanese beetles will burrow into the flower head   and the best way to stop this is a stroll through your garden with a bucket of soapy water and pick them off the flower. Planting a group will give you a continuousdisplay until frost arrives.

Applying fertiliser with a low nitrogen level weekly will produce the best flowers.They are one of the easiest flowers for first time gardeners as they will be almost pest free. The leaves may get very small spider webs which is a sign of spider mites.A spray of 1 gallon of water, 1 tbsp baking soda and ½ tsp Dawn dishsoapshould be applied. This is good for powdery mildew and aphids on all plants.

As soon as the first flower has wilted deadhead it ‘cut it off’ as close to the next branchof the main stem. This will allow many more flowers to form. It can also be done when the first bud appears. This will give it a chance to branch from the base of the leaves on the main stem giving you a plant that looks like a bush.

As soon as frost arrives dig up the tuber and cut off the stem. Allow it to dry off, shake clean and place it in a paper bag with peat. Remember to write the color and type on the bag. Store it in a cool place and check periodically for mold. This is all you will need to do to plant again year after year. So give any dahlia space in your garden even plant one in a large pot with a few small annuals. Sit back and enjoy!

The Tillsonburg Horticultural Society has its main fundraiser – Annual Auction and Plant Sale on Tuesday May 31^st at 5pm in the Lions Auditorium Tillsonburg Community Centre. Many plants, containers and hangers, trees and shrubs, $2 $5 $10 perennial table, vegetables and herbs, draw table and then the auction at 6pm. Come and check it out asthe money raised allows us to beautify Tillsonburg.

The Junior Gardeners Program is a ‘go’ this year. Don’t forget to enrol your children.For registration forms and details see Linda Fenn at Tillsonburg Garden Gate or check Facebook Tillsonburghorticultural.Coming on July 9^th is ‘Garden Artistry 2022’ a Tour of Gardens hosted with Tillsonburg Station Arts Centre. Call for more information 519 842 6151.

The next monthly meeting is Tuesday June 7^th@ 7.30pm in the Senior Centre, Tillsonburg Community Complex, speaker will be Maureen Cocksedge ‘Free plants from division’. Everyone welcome.

HAPPY GARDENING!

ITS STILL JUST DIRT APRIL 2022 by Angela Lassam

Everyone remembers the trees being stripped of their foliage and not being able to sit under a big Maple tree for shade, even finding it hard to go for a walk in a woodlot without being bombarded by small brown beads – yes it was the Gypsy Moth caterpillar munching away in the tree canopy. If left uncontrolled our trees and gardens will suffer dramatically.

The Gypsy moth or its new name ‘spongy moth’ was renamed because of its slur towards the Romani population as it is considered a pest. It was reintroduced to Eastern Canada arriving in soviet freighter.

After the winter when the leaves start to open on a tree the eggs will hatch and become larvae (caterpillar). The newly hatched larvae spin a fine silk thread and it is blown in the wind to infect other trees. They grow very quickly consuming up to one square metre of leaves in a short time and it is during this time we notice the devastation they create. The caterpillar is very easy to see when fully grown. It is dark brown and hairy with a row of red and blue dots. After pupation the male moth, brown in colour will fly between trees seeking the female. Its lifespan is only one week. The female moth which is a cream colour is flightless. She is very easy to see on tree trunks. She lays eggs that look like creamy sacs. There can be as many as 1000 eggs in a sac and many sacs can be seen on the trunks and limbs where they overwinter.  The cycle of the gypsy moth starts again.

There are some ways to reduce their population. When the leaves are just forming in May a bio-pesticide BTK can be sprayed on the tree as far up as you can reach. Read the instructions carefully before applying. Wear protection as suggested but it is harmless to humans as the solution has bacteria specifically for insects.

The alternative is to wrap the trunk with a band of burlap 18” wide. Tie it with string round the middle and fold downwards to create a pocket for the caterpillars to crawl into. Remove them daily into a bucket of bleach and dish soap and dispose of later. Use gloves and be careful as the hairs on the caterpillar can cause severe irritation.

Another way is to carefully scrape the egg sacs off the tree and dispose the same way as caterpillars.

There is some happy news that within three years of a severe infestation it is reported they succumb to viral and fungal pathogens.

Another problem in our garden is a tree that can be found in woodlots and many established gardens. It is the Black Walnut tree. If you have moved into a new home you may have one in your garden. They grow quickly and give a large shade canopy but it nothing will grow under it. A chemical called juglone can be found in all parts of the tree. The fruit (nuts), leaves and roots all leach juglone into the soil. Leaves and nuts should not go into the compost and the roots of this large tree make an area of 50’ from the trunk tainted with juglone. Plants will be stunted, have yellow leaves and poor flowers. There are plants that are not susceptible to its toxicity. Ones well known to gardeners are hostas, hollyhocks, astilbes, purple coneflowers, chrysanthemums, snowdrops and grape hyacinths. Also forsythia, mock orange and yucca will do well. Once any flower has been planted under a black walnut tree it cannot be transplanted in another area as the juglone can live on in it and taint the area around it.

Angela Lassam

Perennials are the backbone of any garden and show continuous color throughout the year. They are so versatile giving structure and texture to create a pleasing picture at any time. You buy them only once for years of pleasure and they need little care and attention.

A perennial is a flower that returns in the garden every year when the soil warms up putting up small buds or tips to remind us where they are.

Most perennials are good to stay in the garden. They go dormant and wait for Spring but there are some that have been introduced from warmer climates and these need to be dug up every Fall and stored to be replanted in the following year. Learning of the types of perennials will help.

Whether you are starting a new bed of flowers or adding to your landscape you will need to read the tags on your choice. The height, width, how much sun and drought tolerance are important. The time of blooming will allow you to have flowers blooming continually to give a glorious show all Summer. Your garden needs to be layered and will be beautiful if the selection of perennial flowers are carefully chosen. A little sketching of a new bed before you buy will give greater satisfaction. Remember they will grow much larger as years go by.

It is less expensive to buy bare root perennials from catalogues, stores or nurseries but their appearance can be disturbing unless you are aware of their characteristics. New gardeners may be surprised at their appearance so let me explain the differences.

Most plants are bare root which is a main centre with hairy roots. These can be planted directly in your garden after risk of frost and watered well to settle the roots. A name marker and a support is a good idea. They will soon produce leaves as the weather gets warmer. Remember the tallest towards the back of a bed. Names of a few are coneflower, poppy, shasta daisy and taller phlox. All of these can be divided in later years to replant elsewhere in your garden or share with fellow gardeners.

Other roots with eyes are called rhizomes, once planted can be left in the soil from there on. The eyes are small tips. The more eyes on the root you purchase the more flowers you can get. Astilbe, Hosta and Peony are in this group and do not require planting too deep, just cover the eyes with soft soil. Peonies will need a cage or other support as flower heads get heavy.

There are other rhizomes that have an underground stem, planted almost on top of the soil. The stem will send out roots, more stem with leaves, and flowers along its length. All irises are like this and will grow into a large clump in a few years. If your iris ’are not producing flowers it may be from the root borer so dig them up and cut away holey parts and replant. The following year – more flowers!

Tubers are bulbous roots with small growing tips which will be the flower. Some of these will need to be lifted in the Fall and stored in peat moss, then replanted the following Spring. They do not like to freeze. Their appearance in packages are tubular with thick skins. For the first year these can be potted and started indoors to give you early flowers. They need to be dug up in the Fall and stored in a dry place preferably in peat moss. Replant the following year for more joy. Dahlias are the best ones which come in all sizes and maturity dates for a continual summer color. Be sure to check the package details.

Of course bulbs should be considered perennial flowers as they will come back year after year. Spring bulbs once planted in the Fall return every year and will naturally multiply and are the first splash of color in the garden-  daffodils, tulips and crocus to name a few. Summer bulbs are the Allium and lilies which are very showy planted in groups.

The choices are endless and all gardeners have some of them in their garden because they are the basis of all landscaping both formal and heavily planted beds. They are rewarding every year and need only deadheading and watering with a fertiliser mix to give a wonderful show.

The Tillsonburg Horticultural Society has returned to its monthly meetings in the Senior Centre Auditorium, Tillsonburg Complex.

Come join us at our monthly meeting and meet like minded gardeners. See you there, become a member for $20 per year or $4 meeting (refunded on membership). Check out our website www.tillsonburghorticultural.ca and Facebook Tillsonburghorticultural for all about gardening.