Beginner to pro level tips are always available at greengate.

Let's get growing!

Whether you are a first timer or a seasoned gardener, we are happy to help you learn all you can about growing an amazing garden or yard.

greengate is open 9:30am - 6pm, Mon. - Sat.
11am - 5pm Sun. & Holidays.

Due to COVID-19, please be aware that we can allow only a limited number of customers inside the store at one time. In accordance with the City of Calgary bylaw, we require the wearing of face coverings and request that you please observe physical distancing. Know that we are following all Alberta Health safety protocols. We appreciate your efforts at this challenging time.

At greengate, we are proud to say we sell locally sourced greenhouse products from Alberta and Canadian growers! This year, all our annuals, perennials, trees & shrubs are Canadian grown! Know that when you shop at greengate, you are helping local families and Canadian farms!

At your service,
greengate Garden Centres Staff and Families.

2020 Fall tree, plant & shrub sale

Although there is plenty of time to enjoy our gardens, sadly, it's the time of year when we have to think of the approaching Fall.

August/Sept gardening chores are a mixed bag. There are things you can do to prolong your gardening season and a few things you must do to prepare for cooler temperatures. Fortunately, there are some tasks you can do now to make your garden even better next spring.

There are even things you can do now to make your garden even better next spring.

Here is a quick "to do" list for the next few weeks:

• You can plant a second crop of cold weather veggies such as kale, spinach, lettuces and radishes. Now is the time to harvest veggies that have come to ripen over the summer.

• Pick your herbs for fresh use in the kitchen or store by drying or freezing.

• Spring bulbs will start to arrive here in early September. Plan where and what you want so that you can plant your bulbs with plenty of time to set roots.

• Check any plants that you may have mulched over the course of the spring and summer to ensure they haven't completely decomposed and that there are sufficient amounts where it's desired. Keeping mulch in the right places ensures water retention cooling of the root systems and keeps weeds from invading your plants' space.

• There is still time to add compost to keep your flowering plants and veggies looking their best right up until frost.

• Allow annual plants that you want to self- seed to do their thing by not deadheading them. Cosmos, Datura, Cleome and pansies come to mind. There is a certain beauty to nature's ability to put plants in attractive arrangements, so if you leave them intact, you'll be pleasantly surprised next year.

• Start to save seeds or take a cutting for next years garden. Choose from your sentimental favourites or the top performers in your yard and grow them again next year!

• Remove any dead or diseased plants and branches so they don't get lost in the fallen leaves. Dispose of them by placing them in the garbage or burning them. Do not add them to your compost pile.

• Prune spent flowers off your shrubs. This will help the plant with root and new growth instead of putting energy into seeds.

• Thin or prune back and fertilize overly full hanging baskets. Doing so will invigorate new growth and prolong their beauty into the fall.

• Take photos of your garden when it's at its peak. Focus on what you love such as hangers or containers you would like to replicate next year. They are a great reference for tweaking what you did or didn't like. It never hurts to take photos of your plant tags if you have saved them.

• It's not too early to make sure your cold frames and greenhouses are in good repair: ready for winter and of course, next spring. Tighten bolts, check for gaps and ensure that your coverage is in good repair. If you are going to overwinter plants, you're ready. If you won't be using it until spring, they will be out before snow can cover the ground.

• Plant trees, shrubs and perennials now so they have time to root in before the winter sets in fully. Water them well until the ground freezes.

• As with your new landscape plantings, be sure to keep your mature garden plants well watered into the Fall. Hydrated roots will help reduce winter injury and will keep your landscape looking tip top.

• Start moving indoor plants back inside. Be sure to clean them off as best as possible to avoid bringing in any unwanted pests. Moving your plants back inside now will get them acclimatized to less light and humidity before the days become very short. Keep windows open as much as possible to help them transition back to the inside.


We can't stress this enough. If you want your plants to be blooming and resilient, then fertilize. There are lots of ways to do this, via compost, water soluble, beneficial fungi and microbes, granular, etc. There isn't really a right or a wrong way. Use which is easiest for you to use. We get asked all the time which is the best fertilizer? It always depends on what you are fertilizing and why. Some plants are struggling, some you're expecting to produce. Each has its own nuance, but if you like to keep it simple, any type of food for your plants is a good thing and some is better than none. If you're seeing plants struggle or maybe not doing their best, the first step would be to fertilize. If you're not sure please come in and ask us.

Tip: Now is the very last chance to fertilize your trees and shrubs. Anything later may cause them to be flushing out new growth when it is time to go dormant and young leaves and branches can be damaged by cold in the fall.


Deadheading refers to simply removing the dead flower heads from your plants. Deadheading is dead easy, so if you're new to gardening don't worry. There are a couple of benefits to doing this. First and foremost, it cleans up the appearance of your plants. It also controls the spread of seeds and encourages your flowers and plants to continue to grow thicker and fuller than before. You may look at your garden and say no chance, there's too much work, but some find the task rewarding and therapeutic. If it looks impossible then break it down into smaller chunks and spread the task over a few days. Some plants can be pinched with your finger's others may require pruners. A great sharp pair of pruners make the task simple and clean cuts are best for your plants. Once you have pruned, fertilize!


Flowers That Benefit from Deadheading:

Not all flowers require deadheading. Peony, Liatris and most bulbs will only produce one round of flowers per season. Most flowering vines, periwinkle and impatiens do not need deadheading. The annuals and perennials that respond well to deadheading and will reward you with a full flower all season long include several of our favourite bloomers. Some that love a haircut include:

• Zinnia
• Cosmos
• Marigolds
• Impatiens
• Delphiniums
• Hollyhocks
• Marguerite Daisy
• Hardy Geraniums
• Petunias
• Snapdragons
• Roses
• Blanket Flowers
• Bee Balms
• Campanulas
• Sweet Peas
• Salvia

Cut Back Perennials

Cut back mounding perennials, such as Coreopsis and Perennial Salvia, often even with regular deadheading, these plants can start to look tired. A hard pruning, also known as cutting back, can give plants a fresh start. This will help keep your garden looking clean and tidy. Try and wait until after the majority of the blooms have faded before you cut them back. The easiest way to cut back perennials is to use a good set of shears and cut the entire plant about 2 inches above the ground. Pinch back tall growing fall bloomers like Asters, Monarda, and Helianthus to make them stockier and full of flower buds, and so they don't bloom too early.

Fill Bare Spots

Even with the moist conditions, you'll find bare patches in the garden. Now is the time to fill them up! Look for some low growing ground cover junipers like Calgary Carpet or add colour with Barberries. If you have extra space consider adding fruit-bearing shrubs like Saskatoons and Haskap. Maybe add a flowering shrub like Potentilla! There are lots of great perennials too that have yet to bloom this summer. There are many economical ways to get bare areas brought to life with a little imagination. You can go the extra mile if you have patience by adding some 4-inch perennials that will return next year bigger and better than before.

Perennials are the unsung hero's of any garden and you may think the gardening season is coming to an end for perennials, but now is a great time to get them in the ground.

Perennials are permanent, sort of, but we'll get to that.

Perennials come back year after year and usually bigger and better than the year before. When you have the right mix of perennials you can have a garden that returns season after season and can bloom from early spring to late fall. There are a few tricks that can help you grow absolutely stunning perennial gardens.

Start with a plan. You can always change it later, but a plan will give you guidelines on what to shop for without becoming overwhelmed or sidetracked. Whether you're starting from scratch or working with an existing bed it's best to plan out what you desire, which plants will do well in the location and imagine plants that will help make it interesting. Sometimes that's easier said than done considering the variety in today's perennial arsenal.

Let's start with shapes and heights. Since perennials are derivatives of native wildflowers they are generally hardy and have many different characteristics. Perennials come in all sorts of shapes and heights and offer much more variety and tolerance when it comes to sun and shade. Look for perennials that have different heights and plant taller ones in the centers or backs of beds. Supplement those with plants that vary in heights, but compliment the larger plants or the bones of the bed. Not every plant in your bed must flower. Many perennials are grown strictly for their foliage, think Hosta, or perennial grasses for instance. There are many different patterns and variegations: even in one family of plant. With planning, you can make quite a showy bed, even with limited varieties. Look for ground covers that can edge or border your perennial garden. Some super nice plants will creep along a border, flower and even withstand foot traffic. Some will grow lower than your mower setting for convenience in beds that border lawns.

Think about colours! There are many extremely vibrant perennial flowers like lilies. Some fascinating colours and mixes can make any annual look ordinary. The trick here is to know when the plants will flower. This should also be part of your plan. Early spring flowers are not only a welcome harbinger of spring but are also good sources of food for both domesticated and native bees. Try and plant perennials that will bloom at differing times in the gardening season, so that you can enjoy blooms throughout it. Every plant has a tag which will indicate when it should flower. By staggering the flowering dates, you can ensure you have plants that are always in bloom. You can cheat too. We will always have a display of perennials in bloom when you come into our centre each month from spring to fall. In this way, you can determine which perennials are flowering and when: for a continuous show of colour all season long.

Never fret about making a mistake. Perennials are hardy and can be moved during late summer or early fall if you don't like where they are, or how they are performing. They are almost permanent, as mentioned above. After a few years, you may notice that your perennials are dying out in the center. This is common. Once you see this happening, it's time to divide them. This is the beauty of perennials. Once they are split, you will have more plants to start to fill in those empty spots in your garden.

Here are a few reasons why it's the best time of year to plant perennials:

1. Fall and Spring Colours

If you plant now, you can add both fall blooming and spring blooming plants for a perennial garden you can enjoy all three seasons: spring, summer and fall.

2. Consistent Fall Weather

Here in Calgary planting in the spring can be a little dicey. Cold snaps, snow and perhaps even frost can damage or even prevent you from getting them in the ground. Spring can also be hot and nasty with hot wind and little precipitation. Fall is a little more predictable. Furthermore, the sun is less intense offering good conditions for rooting before freeze up.

3. Plants Love Warmer Soil

In Calgary and area, the soil in spring is cold. However, root systems flourish best in warmer soil. While the air temperatures drop in autumn, soil temperatures hold up, so the soil stays warm and inviting to plant root systems.

4. Fewer Weeds

Since you have done a fine job of keeping weeds out of the garden all summer, fall-planted perennials won't have to compete.

5. It's Less Hectic in the Garden Now

Spring gardening is a flurry of activity in Calgary! We have to get our precious annuals into beds and baskets, get veggies in the ground and still make time to mow the lawn and clean up the garden - seemingly all on the same day. With most of that behind us, it's easier to find some time to contemplate new perennials.

6. Payback

If you start now, your plants will be bigger and healthier in the spring: giving you a great return on your time and financial investment.

7. Double Whammy

Bulbs will be arriving very soon. Plant spring bulbs along with your new perennials for a double dose of flowers in spring just when you need it! Hint: look for super early bulbs such as crocus and daffodils.

8. Get a Head Start

Perennials planted in the late summer or fall will flourish faster next spring and summer. This means you will quickly be able to see empty spots in your landscape that can be filled with more perennials or annuals when needed.

Try planting these spring-flowering perennials in autumn:

• Coreopsis
• Salvia
• Dianthus
• Leucanthemum
• Lysimachia

Try planting these summer flowering perennials in fall:

• Garden Phlox
• Sedum
• Gaillardia
• Heuchera

Tips: Plant before the frost. Use Myke instead of transplanting fertilizer. Mulch around the base of newly planted perennials to help them overwinter. Water well.

Here are a few things you can do in the garden in August & September:

Divide Perennial Flowers

This is the best time to divide all sorts of perennials such as hostas, grasses, lilies, poppies. Lift the plant, taking up as much root as possible and be careful not to damage it as best you can. Once the clump is out of the ground, cut up the root ball into smaller pieces by using a hori-hori or kitchen knife and then replant as quickly as possible.

Tip: Use Myke Flower or Myke Tree and Shrub on the roots at the time of planting to give them the best chance of survival. Water in well.

Add Fall Colour

Its chrysanthemum season! Brighten up your garden space with potted Mums. These great fall beauties give you a burst of colour as they come in a seemingly unlimited selection of colours, shapes, flower sizes and forms. They also go well with garden decor. Because they are sold in bud or bloom, they'll add instant impact to your pots, planters, flower borders and table centres. Choose a generous helping of chrysanthemums from our irresistible selection to add some zing to your garden. Bonus: these plants are great pollinator attractors, as they are rich in nectar.

Watch For The Pesky Lily Beetle

We know from customers here at the shop that these invasive beetles are on a total power trip right now. Keep an eye out for scarlet lily beetles on your lilies - remove and crush any you see. Also, check for the sticky brown larvae on the underside of leaves. You can treat them by spraying them directly with Trounce. Use diatomaceous earth at the base of the plant to destroy them as they crawl back into the ground to lay eggs.

Tip: These insects have no natural predator here in Canada, so be aware and rid your garden of them a best you can.

Re-pot Houseplants

An easy way to check and see if your tropical plants need to be re-potted is by checking the drainage holes for signs of roots. If roots are either covering the holes or actively growing out of them, this is a good indication that re-potting is appropriate. Select a pot that is slightly larger than the size it is in now. While transplanting use Myke or a root fertilizer e.g. 10-52-10 to help reduce transplant shock.

Tip: Use clean soil (not from your garden) to avoid bringing in insects and also thoroughly clean your plants for the same reason.

Weed Like Your Yard Depends on It

If you haven't already spent some of your summer weeding, now is the time to start. Annual and perennial weeds will be setting seed soon, if not already. A few weeds you have now can drop thousands of seeds if not removed soon. These seeds will very likely germinate in your garden next season. By not removing them now, you will find that getting rid of them later will be far more difficult. Weed after a rainfall so that they come out of the ground easily with their roots intact. If there has been little rainfall, water deeply so that the weeds come out as easily as possible. Crabgrass, Creeping Bellflower, and burdock will quickly regrow from roots left in the ground.

Tip: You can smother some weedy areas with a heavy landscape fabric instead of using round up or other chemical controls.

Plant Trees, Perennials and Shrubs

As it gets later in the season, gardeners tend to think the season is over. It's very far from. This time of year is perfect for planting perennials, trees and shrubs. Roots grow better in the cooler weather, and with a little moisture, will set roots and be ready to pop in the garden next year. Excellent choices are lilies, daylilies, sedum, grasses, peonies, and bearded iris, although most plants grown in containers are good candidates. As always, use a good root starter and water in well.

Tip: Mulch your new plants to help keep moisture in the soil if it gets hot and dry. Water in well right before freeze up.

Water Evergreens

Even though there has been a fair amount of rain, don't be afraid to water your evergreens. Rainwater doesn't usually reach as deep as trees need. Plants such as yew and arborvitae never go completely dormant, so ensure they are well watered into fall. This will help them survive hot and cold winds of fall and beyond. If rainfall is scarce be sure to keep evergreen trees and shrubs hydrated. Watering now through fall will ensure they have lots of moisture when they need it. Newly planted evergreens are particularly susceptible to dry soil so make sure they get at least an inch of water a week.

Tip: Soaker hoses are a great way to irrigate newly planted evergreens.

Harvest Herbs

Herbs reach their peaks of oils, flavours and aroma in mid-summer. Although herbs can be harvested throughout summer and last well into fall, now is a great time to harvest herbs before they flower. Harvest them in the early morning before the heat of the day. You can dry or freeze your herbs to store them through winter.

Consider Fertilizer

Consider whether to fertilize or not. Some plants will do well with fertilization right into fall. Plants such as tomatoes will appreciate the feedings right up to harvest, but trees and shrubs should get no fertilizers. Fertilizer may cause trees and shrubs and some perennials to flush out much later than expected and cause damage from frost as these plants are trying to go dormant.

Harvest Veggies

Potatoes and onions will be ready for harvest as soon as the plants' foliage turns brown and falls over. After harvesting, cut off the dead foliage. Then, move potatoes and onions to a shaded, well-ventilated location for a week to ten days to cure. The curing process toughens the skin and extends storage life. Only after curing, remove any excess soil. Store potatoes in well-ventilated baskets or bins in a dark room. If they're exposed to light, they will turn green and be unusable. Onions can be stored in mesh bags hung from the ceiling in a cool, dark room.

Tip: Both potatoes and onions will store longer between 2-7 degrees Celsius.

At greengate, our customer service is second to none. Here are just a few of our honest customer reviews:

We would love to hear from you too. Please leave us your review.
  • custom alt

    Indoor Tropicals catalogue

    click link to learn more

  • custom alt

    Stihl Catalogue

    click link to learn more

  • custom alt

    Perennials Catalogue

    click link to learn more

  • custom alt

    Soils Catalogue

    click link to learn more

  • custom alt

    Pest Control Catalogue

    click link to learn more

greengate facebook greengate pinterest greengate instagram greengate Twitter greengate YouTube