By Ava Green
As soon as warm weather and sunshine arrive in Southern Ontario, it’s time to head to the garden centre and pick up all the plants we’ve been dreaming about all winter long! May 24th is generally the date we look forward to — the unofficial marker when frosty mornings are behind us and the promise of summer is ahead.
By now, cool-weather plants like cabbage, Brussels sprouts, peas, and lettuce should be well established in the vegetable garden. And for everything else, it’s go time!
TIP: Before you start planting, this is the ideal time to amend your soil. Top up your garden beds with fresh topsoil or enrich them with compost to improve soil health, add nutrients, and promote vigorous plant growth. Don’t forget to refresh the soil in your containers as well, with potting mix or compost.
Warm Weather Vegetables
When soil temperatures are consistently 60°F (15°C) or higher, it’s safe to plant all the warm-weather vegetable crops we’ve been waiting for! Plants that thrive in warmer weather include tomatoes, peppers, eggplants, cucumbers, zucchini and corn.
At Eising Garden Centre, you’ll find vegetables in 6-packs, 4” pots, trellised patio containers, patio bowls and hanging baskets - while supplies last, of course!
Herbs also love warm weather, and tender varieties like basil are safe to plant once all danger of frost has passed. Whether you plant herbs directly into the ground or create a potted herb garden near the kitchen door, they’ll add fresh flavour to your meals all season long. A container of herbs also makes a wonderful gift when visiting friends and family for a summer BBQ.
While you’re in the vegetable and herb aisle, keep an eye out for everbearing strawberries in planters and containers of tropical fruits like lemons, limes, and oranges.
Annual Flowers
Winter-weary flower beds can be revived almost instantly with a burst of colourful annuals! If you’re looking for an immediate impact and blooms that last all summer long, annual flowers are the answer.
Whether you plant them in beds, containers, window boxes, or hanging baskets — or choose from one of our gorgeous pre-planted options — just add water and fertilizer, and you’ll be rewarded with a vibrant display that keeps on giving.
Perennials
While perennials may not bloom all summer, many offer extended bloom periods, and by combining different varieties, you can create a succession of flowers that lasts for months. Perennials also provide essential greenery to anchor your garden and enhance the look of your flowering plants.
You can plant perennials from spring through fall, but getting them into the ground now gives them a strong start. From hostas and ornamental grasses to daisies and delphiniums, there’s a perennial for every style of garden — and the best part is, they’ll return each spring like dependable old friends.
Trees, Shrubs and Vines
Often called “the bones” of the garden, trees, shrubs, and climbing vines add essential structure, height, and seasonal interest. Planting them now allows you to design your garden layers thoughtfully, incorporating annuals and perennials around their base.
Spring is also the prime time to purchase and plant fruit trees and fruiting shrubs. At Eising, spring offers the best selection for starting your home orchard. Are you thinking of adding a few edible shrubs? Gooseberries, haskaps, hardy kiwi, rhubarb and raspberries are excellent choices.
Mulch
Okay, it’s not a plant, but this is a reminder to add mulch to your garden beds or containers. After planting, adding a layer of mulch to your garden beds or containers helps retain soil moisture, reduces transplant shock, and suppresses weeds. Even if a few weeds manage to sneak through, mulch makes them easier to pull.
Water Garden Plants
If you have a garden pond, spring is the perfect time to add water plants. Floating plants, such as water hyacinths and water lilies, help shade the pond’s surface, reducing algae blooms. Marginal or bog plants, such as water iris, papyrus, and cattails, also help keep the water healthy and clear by improving oxygen levels and providing habitats for beneficial wildlife.
Time to Grow!
May is one of the most anticipated and exciting months in the garden. Whether you’re dreaming of fresh vegetables, a lush landscape, or a colourful flower display, planting now sets the stage for a beautiful, bountiful season. Visit us at Eising Garden Centre to find everything you need — and let’s get growing!
While many gardeners in Southern Ontario follow the popular planting date of May 24th, when we’re usually safe from frost, you may be surprised to know that April is not too early for certain plants!
Once the ground has thawed and is workable, there’s plenty you can start growing. In Zones 6a-6b, this usually happens around four weeks before May 24th. While frost is still a possibility, many cold-tolerant plants not only survive a light frost but thrive in cooler weather. To check if the soil is ready, simply dig up a handful and squeeze it. If it sticks together, it’s too wet to work with—wait a few more days for it to dry out. Once the soil is ready, it’s time to plant those cool-weather crops!
Cool Weather Vegetables
Radishes: Radishes are fast-growing and perfect for planting in April because they love cooler weather. Sow them directly from seed.
Peas: April is the perfect time to plant peas outdoors as soon as the soil is workable. Soak pea seeds in water for 8-10 hours before planting them to help germination.
Lettuce, Spinach, Arugula, Asian Greens (Tatsoi, Mizuna, Pak Choi and Leaf Mustard) : It’s best to sow seeds for leafy greens or plant seedlings early in the spring as they will grow quickly in cool weather. Plant more seeds or seedlings every 10-14 days for a succession of greens until hotter temperatures make them bolt (go to seed) and become bitter.
Potatoes: Seed potatoes can be planted in mid to late April as soon as the soil is workable.
Onions: Plant onion sets or seedlings that have already been started in early spring and enjoy a harvest in late summer or fall.
Carrots: Plant carrot seeds in April, and they will be ready for harvest later in the spring or early summer. They take a little longer to grow, but planting early gives you a head start. You will enjoy carrots all summer long by planting more seeds a few weeks later.
Tip: It’s a good idea to keep some frost protection like row cover handy for lettuce, peas and spinach just in case the temperatures dip below zero.
Bonus: Many garden pests, like earwigs and slugs, are still overwintering in April and won’t feast on your tender plants.
Cold-Tolerant Flowers
Pansies: Add a pot of Pansies to cheer up a front porch, and it instantly feels like spring! Plants can go into a sunny spot in the ground when temperatures reach 7-21 celsius and are regularly staying above freezing.
Violas: These cool-weather flowers can withstand light frosts and are perfect for containers or for planting in garden beds
Gladiolas: Even though the weather is still cool, this resilient summer-blooming bulb can be planted in a sunny area of the garden in April.
Bonus: Pansies and Violas also love cool weather in the fall.
Perennials, Trees and Shrubs
Two to three weeks before the threat of frost has passed, many potted perennials, shrubs and trees, either dormant or with leaves, can be planted. (If you’re not purchasing from us, be sure to check whether the plants were grown outdoors or acclimated to cooler temperatures and ensure they’re hardy enough for Southern Ontario.)
While perennials, trees, and shrubs can be planted throughout spring, summer, or fall, the combination of warming soil and increased rainfall in spring creates the perfect conditions for successful transplanting.
Come into Eising Garden Centre to see the many seeds and plants available for you to add to your garden in April!
Additional Resource: Landscape Ontario provides an excellent online Tree Planting Guide.
Let’s face it, summers are short and when we invest in plants we all want annuals and perennials that are long blooming. Flowers that last the duration of the summer are ideal! To achieve this, there are a few things to consider like: the plants you choose, good soil, and the amount of sun the flowers will get. When you come into Eising Garden Centre we can help you find sun or shade loving plants, and soil for your hanging pots, planters or garden beds, but to get started you’ll find some of our favourite plants listed below. First, a little plant primer that will help you make decisions.
Annual? Perennial? What’s the Difference?
Annuals and perennials are in separate areas of the greenhouse because they are plants that we will treat differently in the garden.
Here is the best way to remember the difference:
- Annual plants are planted every year, annually, as they will not survive the winter
- Perennial plant’s roots survive the winter and the plant will regrow each Spring
It’s good to know the difference, right? Now you know what to expect from the plants you buy!
Because Annuals and Perennials are in separate areas of the greenhouse, you might think that the two don’t mix in the garden, but they absolutely do. For example, Perennials can make a great backdrop for Annuals. Or, a well placed pot of Annuals amongst Perennials or shrubs can fill in a gap, or bring a pop of colour once other blooms have faded. Using Annuals, Perennials and Shrubs together can really maximize the beauty in your space!
If you’re not sure where to start, here are some of our favourite sun loving flowering plants that are easy to grow and long blooming!
Annual Flowers
- Petunias are one of the most popular blooming annuals for many reasons - there are a wide variety to choose from, they have a wonderful scent, they’re easy to grow and they bloom from Spring until frost.
- Zinnia flowers are low maintenance, fairly drought tolerant, come in many bright colours, will also bloom continuously from Spring until frost, and will attract butterflies to your garden! All things considered, they are one of the best annuals to grow.
- Geraniums are great for containers, hanging baskets, or as bedding plants and come in a variety of leaf shapes and bloom colours. Another reason why these Annuals are so popular is that they are easy to grow and will keep producing flowers late into the Fall.
- Marigolds come in vibrant colours and are another no-fuss Annual that’s tried and true. These long lasting flowers will also attract butterflies, bees, lady bugs, and other beneficial insects making them very good companion plants in any garden but especially your vegetable garden.
- Cosmos will bloom from late Spring into Fall especially if you remove dead flowers. In return, these colourful, daisy-like flowers will attract pollinating insects as well as birds. Cosmos are also fairly drought tolerant making it a delightful and easy to grow Annual.
Perennial Flowers
- Salvia have spikes of flowers that are long blooming, on plants that are easy to grow, and drought tolerant once they are established. These low maintenance plants will attract butterflies, bees and hummingbirds, and are deer and rabbit-resistant.
- Coreopsis is another drought tolerant perennial that will bloom summer through fall. Flowers are daisy-like and come in vibrant shades of yellow or red.
- Coneflower or Echinacea is a daisy-like flower that is drought-tolerant and long blooming. These sturdy plants have flowers in a wide range of colours from chartreuse to pink, orange, red, and yellow. They come in a range of blossom shapes which make them even more intriguing. If that wasn’t enough, they are also loved by birds and pollinators!
- Rudbeckia, or Black-Eyed Susan are classic perennials that liven up any garden with their sunny colours ranging from yellow to bronzy orange. This durable plant is popular because it is drought-tolerant, pollinators love it, and it’s long blooming.
While most annuals provide a continuous succession of flowers, perennials tend to bloom for two to six weeks. Many perennials will bloom, rest, and then rebloom if you cut off, or deadhead, any spent flowers. A little tender loving care for your annuals and perennials throughout the summer will help blooms last as long as possible. We’ll cover that in our next blog!