By Dave Zeldon and Ely Schweyer

As plant people, we’ve all experienced that moment when we realize the novelty phase of that plant we brought home from the garden centre has worn off. The plant isn’t standing quite as tall, the flowers aren’t as bold, and the leaves are unravelling smaller or not at all. What is this magic they perform in the greenhouse? Perhaps you’ve provided sufficient lighting and adequate watering; there’s just one thing that is often overlooked because dirt is dirt, isn’t it?

  97% percent of plant tissue is made up of carbon, hydrogen, and oxygen pulled from the air and water, the remaining 3% is comprised of 16 other elements taken up from the soil. The quality of soil then is crucial to your plant’s health. Whether your plants are in pots or in ground, each soil type you could provide your plant offers something unique and may lack in another.

*Clay particles are even smaller than silt particles.

Resist the Urge to Slam Your Plant in Potting Soil

There’s bags and bags of rocks, sand, bark, manure, and moss on the shelves, yet the common buyer seems to always opt for potting mix. It’s fair; organic matter is usually great for plants and simple to use. However, most people don’t realize it’s merely an ingredient.

   Strictly using potting mix is like attempting to make a loaf of bread out of only flour. All those bags of other materials on the shelves are also components for a successful plant diet!

  Potting mix is a great base material, however, alone it presents risks of compacting, becoming waterlogged, can mold easily, and over time will become depleted of nutrients. Consider mixing the following ingredients into your pots, ground and raised beds to meet your plant’s required nutrients, pH level, and volume of moisture.

🖱️Use our Plant Finder to find some details on your plant! We try our best to keep this updated!

👍 Rule of Green Thumb: Plant roots can help you to determine the medium needed – thick, robust roots (i.e., yucca) typically enjoy chunkier materials, and smaller, delicate roots (i.e., begonias) enjoy finer materials.

Mulch and Bark Bites

• Mulch is the organic slow-release fertilizer, as it slowly decomposes, it lowers soil pH. However, may eventually compact soil once fully broken down.
• In the meantime, it creates shelves in the soil that create air pockets and prevent the soil from compacting. Mulch is a great short term medium for arid potted plants.
• If kept too wet, it can harbour fungus gnat larvae.
• Make sure when sourcing your mulch it doesn’t contain any black walnut.

🖱️ See more on mulching here. 

Sphagnum Peat Moss

• Peat moss is used to help retain moisture and lower pH in the soil given it is harvested from bogs.
• Retains nutrients very well.
• It is difficult to rehydrate once it loses moisture.

Coconut Coir

• Coco coir, much like peat moss is used to keep the soil moist and keep pH low, however it lasts longer and is possibly less invasive to harvest.

Sand

• Grains are relatively large and do not bind, allowing for excellent drainage depending on grade.
• Adds weight to top heavy plants.
• Has no ability to store minerals itself, however, pH can vary by its content of shells, minerals like silica, or fine organic matter.

Manure & Compost

• Source these organic by products locally and ensure they’re not too hot. These additions can significantly lower pH.
• Sheep manure is usually near free of weed seeds as sheep digest seeds better than cattle and horses!

Perlite

• Perlite is a volcanic byproduct (so it floats like pumice) that helps drainage in the soil and prevents compaction – vital in the case of starting seeds.
• If a rockier, well-draining medium is required for your plant, consider perlite.
• Perlite can expand holding trace amounts of water.
• Perlite has a neutral, slightly acidic pH.
• Make sure when sourcing perlite, that you are not being sold Styrofoam balls.

Vermiculite

• Vermiculite is a recycled mineral used similarly to perlite, and too has a neutral, slightly acidic pH.
• Expands with water content.
• Can contain amounts of potassium and magnesium (as well as good cation exchange capacity).
• Runs the potential risk of introducing asbestos into your soil.

Calcined Clay Materials

• Clay materials like recycled brick bits, pottery, or lecca are typically used for arid plants as it improves aeration and drainage.
• Can raise pH.
• Can retain some water.
• High cation exchange.
• Can also be used for starting robust cuttings when kept moist.  
• Probably not ideal for inground amendments.

Maintaining Your Plant’s Dietary Needs

Perhaps we’ve crafted the perfect soil type for your plant – your plant thanks you – but over time, we will end up in the same staling predicament. Why? Because with each thorough watering, we leech the soil of the provided nutrients. Best we use the plant-specific required fertilizer for your plant to prevent nutrient loss.

   Organic sources of fertilizer such as bonemeal, composts, and manures, along with the application of lime, will improve the physical condition of the soil in terms of water and element holding ability. Unfortunately, in many cases though, manures and lime alone cannot be depended upon to provide enough available nutrients in soils with low essential element reserves.

   Let’s talk about commercial fertilizers, which can help target your plant’s exact needs much like vitamins and supplements!

The Scoop on Fertilizers

Of the essential 16 elements your plant pulls from the soil, Nitrogen (N), Phosphorus (P), and Potassium (K) are the most critical for good plant growth. You’ll recognize the three numbers appearing on your commercial fertilizer labels known as the fertilizer analysis of the product, representing the percentage of each of the three "macronutrients" in the order of N, P & K.

Nitrogen (N) is necessary for green leafy or vegetative growth which is important in crops like corn, cabbage, and potatoes.

☝️ It is important to remember that you should not use a fertilizer which is high in nitrogen late in the summer on your perennials, as it may cause a boost of growth which will only freeze as the cold weather sets in. Also, too much nitrogen in the analysis could cause too much lush, leafy growth thus inhibiting the desired flowering aspect of a plant species.

Phosphorus (P) promotes the development of flowers, fruit and roots. Crops like tomatoes, cauliflower and garden flowers.

Potassium (K) boosts plant hardiness, stem strength, resistance to disease and drought which is important to all crops, but especially in potatoes, celery and rhubarb.

👍 Rule of Green Thumb: For foliage plants, provide them with shade and lots of nitrogen, and for flowering and fruiting plants, provide them with lots of sun and lots of phosphorus!

Amending Clay

Hello Haldimand and Eastern Norfolk!

   We’re presented with the challenge of compacted, often shallow and waterlogged clay, which proves difficult but not impossible.

   Clay becomes compacted and waterlogged as it is the smallest soil particle – smaller than a grain of sand, and even smaller than silt – with rough edges that allow it to interlock and bind. In this instance, roots cannot penetrate further into the soil, are susceptible to root rot, and air pockets are slim to none.

   This, however, can be fixed with the addition and renewal of the above materials.

  Mindful that you don’t create a watery bowl in the ground (score the edges the area being worked), you can add organic matter (i.e., manure, compost, and potting soil) for nutrients, as well as mulch, sand and perlite for aeration and drainage. Annual soil particle aggregation in clay soils increases air porosity (air pockets) and is accomplished by the incorporation of organic matter that breaks down to form humus.

🖱️ See more here for planting trees in clay. 

We hope this soil and fertilizer guide helps you provide all the vital nutrients to your beloved plants in ground and above ground! For more information - and soil – visit Eising Greenhouse and Garden Centre! 🌱

How To Keep Your Orchid Alive

By Ava Green

Orchids have become very popular gifts, and a great hobby for indoor plant enthusiasts who discover the wide range of colours and shapes available. Orchids are also loved for their long-lasting and exotic blooms.

While some may choose to only enjoy these tropical plants as long as they’re blooming, orchid-lovers look forward to nurturing the plant and encouraging it to flower regularly. It may be a little daunting at first, but once orchids grace you with their stunningly beautiful blossoms, you will find that a little bit of care is very worthwhile!

It’s estimated that there are 25,000 different species of orchids and over 100,000 hybrids! The ones you’ll find most readily in Ontario stores are Phalaenopsis or moth orchid, because it’s fairly easy to grow. Phalaenopsis are the best choice for beginners.

Other orchids you may find easily are Cattleyas (Corsage Orchids), Cymbidiums (Boat Orchids) and Dendrobium orchids.

While all of these may be orchids, they don’t necessarily require the same care, so it’s a good idea to check the tag for the type you have and its specific care requirements. The following is a general guide to light, water, fertilizer, and growing medium for the most commonly found orchids, but it does not apply to all breeds.

Light and Air

For most orchids, light, and lots of it, is the general rule. Place your plants within 3 feet of a window (not to the side) in the sun. South, east, and west-facing windows are all fine for maximizing the light your plant receives.

Orchids also enjoy a breeze or circulating air in your house. They do not like temperature extremes, though 15 to 20 degrees Celsius is safe. Keep in mind that the more warmth and air movement there is, the more often you will need to water your orchid.

Water

A general rule is to use water that is not hard and has not been softened with salt. Salt will kill an orchid. Rainwater, reverse osmosis, or distilled water are good choices. Chlorinated water is not an issue for orchids - high sodium levels are.

The biggest issue many people have is either over-watering or underwatering their orchids. Here is the method we recommend:

Every 5-7 days, place the pot in a container or the sink, then fill it with enough water to cover the top of the pot. Be careful not to let water collect in the crook at the base of the leaves, as standing water will rot the leaves and the plant. Once the plant’s growing medium is thoroughly soaked, remove it from the water and allow the pot to fully drain in the sink before placing it back in its saucer. 

We prefer using a container of water rather than the sink, so the remaining water can be used to water other plants.

Here’s the best watering advice we can give you: look at the overall health of both the plant AND its root system. Full, plump leaves and vibrant, green roots indicate that your plant is getting enough moisture. Puckered leaves and a silver sheen on the roots indicate insufficient water. Mushy, brown leaves and roots are signs of rot caused by too much water.

You may hear of another watering method that involves using ice cubes, but it’s controversial and not widely recommended. To quote the American Orchid Society, “Ice is for cocktails, not orchids. Never use ice on tropical plants to water them.”

“Soil” and Nutrients

Most orchids naturally grow high up in trees, where their roots cling to bark and absorb moisture from the air. At home, we try to mimic those conditions, which is why orchids are typically planted in chunky mediums like bark, coconut husk, charcoal, or perlite rather than traditional soil. While many of the roots stay inside the pot, it’s completely normal for some to grow up and over the edge.

These “escapee” roots might look a little wild, but don’t worry, there’s nothing wrong with your orchid. In fact, those aerial roots are a sign that the plant is healthy and doing exactly what orchids do in nature.

It’s worth noting that not all orchids grow the same way. Many, like Dendrobiums, are epiphytic (growing on trees) or lithophytic (growing on rocks), though some orchid varieties are terrestrial and grow in the ground. The good news is that the growing medium your orchid comes in is chosen specifically for that variety, so you can trust it’s in the right environment.

The bark that your orchid is planted in will slowly break down and become mushy. It’s a very good idea to repot your plant every two years.

It’s generally recommended to feed most orchids, and bloom time dictates which fertilizer to use and how often to feed. Begin by using a water-soluble 20-20-20 fertilizer, mixing it at ¼ the amount recommended for other houseplants. Apply this solution every 2 weeks in the summer and every 3 weeks in the winter.

“The orchid, with its many forms, is a reminder that life is full of surprises.” — Leonardo da Vinci.

Lastly, here’s an orchid fun fact: While we have been talking about tropical orchids in this article, there are also orchids that grow right here in Ontario! That’s right, there are over 50 species in this province, including the much-loved Pink Lady’s Slipper (Cypripedium acaule).  

Resources for more detailed and specific information: 

Toronto Master Gardeners - https://www.torontomastergardeners.ca/gardeningguides/growing-orchids-a-toronto-master-gardeners-guide/

Canadian Orchid Congress - https://canadianorchidcongress.ca/basics/growing-orchids/

American Orchid Society - https://www.aos.org/orchid-care/indoor-orchid-care

Ontario Wildflowers - https://ontariowildflowers.com/main/group.php?id=18

By: Ava Green

One of the best things about living in southern Ontario is the beautiful show our deciduous trees and shrubs put on each fall. 

Autumn is also the perfect time to plant trees, shrubs, and perennials. The sun is less intense, temperatures are slightly cooler, and with regular, deep watering, the plants are less prone to transplant shock, ensuring a successful planting. 

As the leaves begin to change, they mark the arrival of autumn, a season full of colour and celebration. If fall is a special time of year for you, our staff have handpicked their favourite deciduous trees and shrubs with the most stunning seasonal displays. Here are their top recommendations.

Autumn Blaze Maple

Botanical Name: Acer x freemanii 'Jeffersred'

This tree is a cross between the fast-growing Silver Maple and the showy Red Maple - two very popular trees! 

Autumn Blaze will provide a display of colour throughout autumn by starting earlier and lasting longer than most other trees. It’s large, with 5-inch leaves that begin by turning red at the top, then eventually shades of red and orange cascade down the length of the tree. 

Even in the winter, this is a beautiful specimen because its shape is so symmetrical.

Seven-Son Flower

Botanical Name: Heptacodium miconioides

Considered a small tree or large shrub, Seven-Son Flower is popular for its year-round beauty! 

Growing to a maximum of 6.1 metres (20 feet) tall and 3 metres (9.8 feet) wide, the leaves of this plant change from spring to summer, making it an interesting specimen plant in the garden. 

The biggest attraction is the fragrant white blooms it produces late in summer, which are highly attractive to hummingbirds and other pollinators. As the blooms fall, they leave behind pink sepals, so it looks like it’s in bloom all over again!

Its unusual bark makes this tree beautiful year-round, but especially in the winter.

Washington Hawthorn

Botanical Name: Crataegus phaenopyrum

Leaves that turn vibrant shades of orange, purple or scarlet red in the fall are just part of the beauty of this small tree.

This is another specimen with year-round interest. In early spring, reddish-purple leaves emerge, which eventually turn dark green, followed by graceful white flowers. After its fall show, it produces bright red berries that last for most of the winter.

Maturing at 8 to 9 metres (25-30 feet) tall, Washington Hawthorn is also an important nectar plant for pollinators and provides food for birds in the winter.

Barberries

Botanical Name: Berberis thunbergii

Depending on the type of Barberry these deciduous shrubs can grow ½ to 3 metres (1-10 feet) tall and have varied shapes and features as well. For example:

• Barberry, Concorde (Berberis thunbergii 'Concorde')forms a nice globe when it's mature. Leaves start out red and gradually turn a deep, dark purple as they mature.
• Barberry, Ruby Carousel (Berberis thunbergii 'Bailone') is a compact variety with vibrant, ruby-red foliage.
• Barberry, Rose Glow (Berberis thunbergii 'Rose Glow') which matures to 1 to 1 ½ metres (3-5 feet) tall, starts out with a combination of green, white, and deep rose-red foliage in the spring. In the fall, it produces bright red berries that persist into winter.

Beautyberry, Pearl Glam

Botanical Name: Callicarpa 'NCCX2'

While many Beautyberry are showy in the fall, Pearl Glam is an upright, small shrub that has all-season interest. Its dark purple foliage emerges in the spring that lasts until frost. 

In late summer it’s adorned with white flowers which attract butterflies and bees. After blooming it produces hundreds of beautiful violet-purple berries which last long after the leaves have fallen.

Crepe Myrtle, Cherry Mocha

Botanical Name: Lagerstroemia 'Cherry Mocha'

Another small ornamental deciduous shrub with an upright growing habit, Cherry Mocha Crepe Myrtle has decorative appeal in every season.

Burgundy coloured stems with semi-glossy burgundy leaves makes this plant stand out. To add to that, new growth at the tips starts out glossy, deep red. If that’s not enough, in late summer and early fall, the blooms on this cultivar are large, cherry-red flowers which stand out from the burgundy foliage. Its flowers late in the season provide important food for bees. After flowering, green seed pods provide extra interest.

Note: Have you ever wondered why leaves on trees and shrubs change each fall? Here’s a simple explanation. During the long, sunny days of summer, trees and shrubs produce plenty of chlorophyll - the food needed to keep the leaves green. In autumn, as the days grow shorter and temperatures are cooler, there is less chlorophyll produced and the plant breaks down residual chemicals on the surface of the leaves which produces shades of red, orange and yellow.

You’ll find more information in our handy Eisings online Plant Finder!

Dealing with water restrictions or choosing to conserve water? You’re not alone. Many gardeners in Norfolk County are facing the challenge of keeping gardens thriving with less water. The good news? A lush, colourful garden is still within reach—thanks to drought-tolerant perennials.

When we think of drought-tolerant plants, cacti might be the first thing that comes to mind. But there’s a surprising variety of beautiful, hardy perennials that can handle our region’s dry spells—no desert landscape required.

While these plants do need regular watering when first planted, once established, they’re low-maintenance and well-suited to Southern Ontario’s climate, including periods of limited rainfall.

Full Sun Ground Cover

• Candytuft (Iberis sempervirens)
• Catmint (Nepeta x faassenii)
• Hardy ice plant (Delosperma nubigenum)
• Hens and chicks (Sempervivum tectorum)
• Moss phlox, creeping phlox (Phlox subulata)
• Pincushion flower (Scabiosa japonica var. alpina) (S. ‘Butterfly Blue’)
• Pinks (Dianthus alpinus)
• Rock cress, wall cress (Arabis species)
• Rock rose, sun rose (Helianthemum hybrids)
• Spurge (Euphorbia myrsinites) (E. polychroma)
• Stonecrop (Sedum acre) - dwarf varieties
• Thrift, sea pink (Armeria maritima)
• Thyme (Thymus species)

Full Sun, Medium to Tall Plants

• Beard-tongue (Penstemon digitalis) – Native
• Bergenia (Bergenia crassifolia)
• Black-eyed Susan (Rudbeckia hirta) – Native
• Blanket flower (Gaillardia x grandiflora)
• Butterflyweed (Asclepias tuberosa) – Native
• False indigo, wild indigo (Baptisia australis)
• Hairy penstemon (Penstemon hirsutus) – Native
• Lanceleaf coreopsis (Coreopsis lanceolata) – Native
• Lavender (Lavandula angustifolia)
• Orange coneflower (Rudbeckia fulgida ‘Goldsturm’)
• Perennial cornflower (Centaurea montana)
• Poppy (Papaver species)
• Purple coneflower (Echinacea purpurea)
• Prickly pear cactus (Opuntia compressa) – Native
• Russian sage (Perovskia atriplicifolia)
• Salvia (Salvia nemerosa hybrids)
• Sea Holly (Eryngium species)
• Silver sage, wormwood (Artemisia ludoviciana)
• Threadleaf coreopsis (Coreopsis verticillata) – Native
• Yarrow (Achillea millefolium)  

Full Sun Grasses

• Big bluestem (Andropogon gerardii) – Native
• Blue fescue (Festuca glauca)
• Blue oat grass (Helictotrichon sempervirens)
• Feather reed grass (Calamagrostis x acutiflora ‘Karl Foerster’)
• Little blue stem (Schizachyrium scoparium) – Native
• Switch grass (Panicum virgatum) – Native

Groundcover for Shade

• Barrenwort (Epimedium hybrids)
• Bigroot geranium (Geranium macrorrhizum)
• Canada anemone (Anemone canadensis) – Native
• Creeping phlox (Phlox stolonifera)
• Sweet Woodruff (Galium odoratum)
• Wild ginger (Asarum canadense) – Native
• Woodland phlox (Phlox divaricata) – Native

Medium to Tall Plants for Shade

• False Solomon’s seal (Maianthemum racemosum) – Native
• Solomon’s seal (Polygonatum biflorum) – Native

Ferns for Dry Shade

• Christmas fern (Polystichum acrostichoides) – Native
• Hay-scented fern (Dennstaedtia punctilobula) – Native
• Marginal wood fern (Dryopteris marginalis) – Native
• Male fern (Dryopteris filix-mas) – Native
• Rock fern (Polypodium virginianum) – Native

A Little TLC

It doesn’t take much to keep drought-tolerant plants thriving—just a little attention and some seasonal TLC. While they’re tough, even these hardy perennials appreciate an occasional deep watering during extended dry spells, especially in their first year.

For sun-loving perennials, skip the heavy fertilizers. Instead, an annual layer of compost is all they need to stay healthy and strong.

Shade-loving drought-tolerant plants, on the other hand, benefit from a layer of mulch. This helps retain moisture and reduces evaporation, especially in dry shade, which is one of the most challenging conditions for any plant to thrive in.

And don’t forget to deadhead regularly! Removing spent blooms encourages your plants to keep producing flowers instead of going to seed, meaning more colour, for longer.

With a few simple care tips, your drought-tolerant garden can remain beautiful and resilient throughout the entire season.

Other resources:

• Landscape Ontario: Eight Beautiful Drought Tolerant Plants
• Toronto Master Gardeners: Drought Tolerant Plants
• Guelph.ca: Drought Tolerant Native Plants