How To Grow Bok Choy in Canada | Complete Guide

Download | How to Grow Bok Choy in Canada | Complete Growing Guide (PDF)

Bok choy, also called pak choi, is a fast-growing Asian leafy vegetable that thrives during the cooler parts of the Canadian growing season. Its crisp, juicy stalks and tender green leaves are excellent in stir-fries, soups, noodle dishes, and steamed vegetable recipes.

Although bok choy is relatively easy to grow from seed, planting at the right time is especially important. Prolonged cold exposure can encourage premature flowering, while hot weather, long days, and drought can also contribute to bolting. For many Canadian gardeners, autumn is the most reliable season for producing beautiful, tender heads.

Bok choy comes in several sizes, from compact varieties such as Toy Choy to larger varieties such as Bopak. Choosing the right variety and providing sufficient spacing will help you grow the harvest you want.

This complete guide explains how to grow bok choy from seed in Canada, including regional planting dates, germination, direct sowing, transplanting, bolting prevention, watering, fertilizing, pest management, harvesting, and storage.

Bok Choy Growing Guide at a Glance

Feature	Growing Requirement
Botanical Name	Brassica rapa subsp. chinensis
Plant Type	Cool-season biennial grown as an annual leafy vegetable
Sun Exposure	Full sun to partial shade; approximately 4–6 hours or more of direct sunlight
Soil	Fertile, moisture-retentive, well-drained soil; pH approximately 6.0–7.0
Start Indoors	Approximately 3–4 weeks before transplanting outdoors
Direct Sow	Mild spring weather or midsummer to late summer for an autumn crop
Sowing Depth	0.5–1 cm (¼–½ inch)
Germination	Approximately 4–10 days; favourable soil temperature around 18–24°C
Plant Spacing	25–35 cm for full-size varieties; approximately 15–20 cm for compact varieties
Row Spacing	30–45 cm, depending on variety and garden layout
Watering	Consistent moisture; approximately 2.5 cm of water weekly as a starting point
Difficulty	Easy to moderate, primarily because of bolting and pests
Container Growing	Yes, especially compact varieties

Choosing Bok Choy Varieties for Canadian Gardens

Not all bok choy varieties grow to the same size. Some produce substantial plants with broad white stalks, while others remain compact even when fully mature. Baby bok choy can refer to young harvested plants or naturally smaller varieties.

'Bopak' Bok Choy

Bopak is a white-stemmed bok choy that can be harvested young or allowed to develop into a larger, mature plant. Its broad, crisp stalks and tender green leaves make it an excellent choice for stir-fries, steaming, soups, and fresh cooking.

For gardeners wanting a substantial harvest rather than miniature individual heads, Bopak is the better choice of the two varieties featured by Caribou Seed Company.

Shop Bopak Bok Choy Seeds

Toy Choy Bok Choy

Toy Choy is a naturally compact variety with dark green leaves and crisp white stalks. It is well suited to smaller gardens, raised beds, containers, and individual-serving harvests.

Unlike Bopak, Toy Choy is intended to remain small. Allowing it to grow longer will not turn it into a large, full-size bok choy.

Shop Toy Choy Bok Choy Seeds

Shanghai Green and Mei Qing Choi are included for comparison; the featured Caribou Seed Company varieties are Bopak and Toy Choy.

Caribou Growing Note: Choose the Right Size

If your goal is a large, mature bok choy, choose Bopak and provide adequate spacing. For small individual heads or container growing, Toy Choy is a practical choice. Always consider the variety's natural mature size when planning your garden.

When to Plant Bok Choy in Canada

Bok choy performs best during mild weather, generally around 15–21°C. It can be grown in spring and autumn across much of Canada, but timing is important because it is sensitive to temperature-related bolting.

In spring, prolonged chilling can encourage plants to flower prematurely as temperatures rise and days lengthen. In summer, hot weather, drought, and long daylight hours may also encourage bolting.

For many Canadian gardeners, late-summer planting for an autumn harvest offers the most dependable growing conditions.

Spring Planting

Start seeds indoors approximately 3–4 weeks before your intended transplanting date, or direct sow when the soil is workable and prolonged cold weather is unlikely.

Unlike cabbage or kale, bok choy should not automatically be transplanted several weeks before the last spring frost. Although established plants can tolerate light frost, extended exposure to low temperatures can trigger premature flowering.

Use the weather forecast rather than the calendar alone. Protect young plants from repeated freezing conditions and harvest before sustained summer heat arrives.

Fall Planting

For autumn crops, sow seeds in midsummer to late summer, allowing enough time for plants to mature before severe freezing weather and sharply reduced daylight.

As a practical starting point, sow approximately 8–10 weeks before the average first autumn frost for larger varieties. Compact varieties may require less time, but always check the maturity information on the seed packet.

In hot regions, keep the seedbed consistently moist and consider starting seeds in a cooler, sheltered location. Transplant carefully once temperatures become more favourable.

Canadian Bok Choy Planting Calendar

These are approximate planting windows. Local frost dates, temperature patterns, and variety maturity are more important than provincial boundaries. In shorter-season regions, compact varieties and protected growing conditions may be especially useful.

Read More | Cold-Hardy Crops to Grow Late Into the Season

How to Direct Sow Bok Choy Seeds

Direct sowing is a simple and reliable way to grow bok choy, particularly for autumn crops. It avoids transplant shock and allows plants to establish in their permanent growing location.

Step-by-Step Direct Sowing

1. Choose a Location: Select a fertile, well-drained garden bed receiving full sun or partial shade.
2. Prepare the Soil: Loosen the top 15–20 cm of soil and incorporate finished compost where needed.
3. Sow Seeds: Plant seeds approximately 0.5–1 cm deep, initially spacing them 3–5 cm apart.
4. Space Rows: Allow approximately 30–45 cm between rows.
5. Water Gently: Keep the seedbed evenly moist without waterlogging.
6. Protect Seedlings: Use fine insect netting if flea beetles or cabbage butterflies are common.
7. Thin Plants: Thin seedlings to the final spacing recommended for the variety.

For Bopak grown to a larger size, allow approximately 25–35 cm between plants. Toy Choy can generally be spaced closer, around 15–20 cm, depending on the desired harvest size.

When thinning, snip unwanted seedlings at soil level if neighbouring plants are very close together. This helps avoid disturbing their roots.

Bok Choy Seed Germination

Bok choy seeds typically germinate within approximately 4–10 days under favourable conditions. Soil temperatures around 18–24°C encourage reliable germination, although seeds may germinate outside this range.

Tips for Successful Germination

• Use fresh, properly stored seeds.
• Sow at the recommended depth of 0.5–1 cm.
• Keep the soil evenly moist until seedlings emerge.
• Avoid allowing the soil surface to form a hard crust.
• Protect the seedbed from drying out during hot weather.
• Prevent waterlogging, which can encourage seed decay.

Why Aren't My Bok Choy Seeds Germinating?

Poor germination may result from dry soil, excessive heat, cold soil, planting too deeply, waterlogged conditions, or reduced seed viability.

During summer sowing, hot and dry soil is a common challenge. Water the seedbed carefully and provide temporary light shade if necessary until seedlings establish.

How to Start Bok Choy Seeds Indoors

Starting bok choy indoors can help gardeners produce an earlier spring crop or establish seedlings for autumn planting when outdoor soil is too hot for dependable germination.

Because bok choy grows quickly, it should not remain in seed trays for too long. Overgrown or rootbound seedlings are more likely to experience transplant stress.

Step-by-Step Indoor Seed Starting

1. Fill individual seed cells with clean, moist seed-starting mix.
2. Sow seeds approximately 0.5–1 cm deep.
3. Maintain temperatures around 18–24°C during germination.
4. Keep the growing medium evenly moist.
5. Provide approximately 14–16 hours of suitable grow-light exposure daily after emergence.
6. Thin to one healthy seedling per cell.
7. Grow seedlings under bright light with moderate temperatures.
8. Begin hardening off before transplanting outdoors.

Plan to transplant seedlings when they are approximately 3–4 weeks old, provided outdoor conditions are suitable and roots have not become crowded.

Hardening Off and Transplanting Bok Choy

Indoor-grown seedlings must gradually adjust to outdoor sunlight, wind, and temperature fluctuations before transplanting.

Harden off seedlings over approximately 7–10 days, beginning with short periods in a sheltered location and gradually increasing their exposure.

How to Transplant Bok Choy

1. Choose a mild, cloudy day or transplant in the late afternoon.
2. Prepare fertile, well-drained soil.
3. Remove seedlings carefully, keeping the root ball intact.
4. Plant at approximately the same depth as in the seed tray.
5. Space Bopak approximately 25–35 cm apart for larger heads.
6. Space compact Toy Choy approximately 15–20 cm apart.
7. Water thoroughly after transplanting.
8. Protect seedlings from strong wind, intense sun, and prolonged cold.

Avoid exposing recently transplanted bok choy to repeated hard freezes or extended chilling. This is especially important for spring crops.

How to Prevent Bok Choy from Bolting

Bolting occurs when bok choy begins producing a flowering stalk instead of continuing normal leafy growth. Once flowering starts, the leaves and stalks may become tougher or more bitter.

Cold exposure is an important cause of bolting in bok choy. Plants exposed to sufficiently low temperatures for an extended period may begin flowering when conditions warm and daylight increases.

High temperatures, long days, drought, and other stresses can also encourage premature flowering.

Ways to Reduce Bolting

• Plant at the Right Time: Avoid prolonged cold exposure during spring establishment.
• Grow an Autumn Crop: Shortening days and gradually cooling temperatures often provide favourable conditions.
• Maintain Moisture: Avoid allowing plants to experience prolonged drought.
• Prevent Transplant Stress: Transplant young seedlings before they become rootbound.
• Provide Suitable Light: Use light afternoon shade during unusually hot weather.
• Harvest Promptly: Do not leave mature plants in the garden unnecessarily.

Caribou Growing Note: Autumn Is Often Easier

For gardeners who struggle with spring bolting, try growing bok choy for an autumn harvest. Late-summer sowing followed by gradually cooler temperatures and shorter days often produces more dependable results. Just make sure the crop has enough time to mature before severe freezing weather.

Soil, Sunlight, and Fertilizing Requirements

Bok choy grows best in fertile, well-drained soil that retains moisture without becoming waterlogged. A soil pH of approximately 6.0–7.0 is suitable for healthy growth.

Sunlight

Provide full sun to partial shade. Approximately 4–6 hours of direct sunlight can support growth, although more light is often beneficial during cool weather. In hot summer conditions, some afternoon shade may reduce stress.

Preparing the Soil

• Loosen the top 15–20 cm of soil.
• Remove weeds and large clumps.
• Incorporate finished compost if needed.
• Ensure adequate drainage.
• Avoid repeatedly planting brassica crops in the same location.

Fertilizing Bok Choy

Bok choy benefits from adequate nitrogen because the edible crop consists primarily of leaves and stalks. However, excessive fertilizer is unnecessary and may contribute to overly soft growth.

Prepare the bed with finished compost and use a balanced vegetable fertilizer if soil fertility is insufficient. Follow soil test recommendations or product directions rather than applying large amounts automatically.

Pale leaves and slow growth can indicate nutrient deficiency, but they may also result from waterlogged soil, cold temperatures, or root damage.

Watering and Mulching Bok Choy

Consistent moisture helps bok choy produce crisp stalks and tender leaves. Irregular watering can slow growth and increase plant stress.

As a starting point, provide approximately 2.5 cm of water weekly, including rainfall. Plants may require more during warm, dry weather, particularly in raised beds and containers.

Watering Tips

• Keep soil evenly moist during germination.
• Water thoroughly after transplanting.
• Check soil moisture regularly during active growth.
• Water near the base of plants where practical.
• Avoid allowing soil to remain saturated.
• Use a light layer of organic mulch to conserve moisture.

Caribou Growing Note: Consistent Growth Means Tender Stalks

Bok choy grows quickly, so even short periods of drought can affect quality. Regular watering and suitable growing temperatures help maintain tender leaves and crisp stalks.

Growing Bok Choy in Raised Beds and Containers

Bok choy is well suited to raised beds and containers because it has a relatively short growing period and does not require a very deep root zone.

Raised Beds

• Use fertile, well-drained soil.
• Provide sufficient space for the chosen variety.
• Keep soil evenly moist, particularly during warm weather.
• Install insect netting where cabbage pests are common.
• Consider autumn planting after an earlier crop has been harvested.

Containers

Choose containers approximately 25–30 cm deep or larger, with adequate drainage holes and enough width for mature plants.

Toy Choy is particularly suitable for container gardening because of its naturally compact size. Bopak can also be grown in containers when provided with sufficient space.

Use quality potting mix and monitor moisture frequently, since containers dry out more quickly than garden beds.

Common Bok Choy Pests and Diseases

Bok choy belongs to the brassica family and shares several pests and diseases with cabbage, broccoli, kale, and turnips.

Flea Beetles

Flea beetles create numerous small holes in leaves and can severely damage young seedlings.

Prevention: Install fine insect netting early and keep plants growing vigorously.

Imported Cabbageworms

Green caterpillars feed on leaves, leaving irregular holes and droppings.

Prevention: Use fine insect netting and inspect leaves regularly for eggs and caterpillars.

Cabbage Loopers

These caterpillars chew holes in foliage and can reduce the quality of edible leaves.

Prevention: Monitor plants frequently and use suitable physical barriers.

Slugs

Slugs feed on leaves and young plants, particularly during cool, damp weather.

Prevention: Reduce damp hiding places and monitor plants regularly.

Aphids

Aphids may gather on tender leaves and stems, especially when plants are stressed.

Prevention: Inspect new growth and manage infestations before populations become large.

Clubroot

Clubroot is a soilborne disease that causes swollen roots, stunted growth, and wilting. The pathogen can persist in soil for many years.

Prevention: Avoid moving contaminated soil, practise crop rotation, improve drainage, and maintain suitable soil pH. Where clubroot is present, pH management may reduce disease pressure but does not eliminate the pathogen.

Black Rot

Black rot is a bacterial disease that may cause yellow, V-shaped lesions along leaf margins and darkened veins.

Prevention: Use healthy seed, remove infected crop debris, avoid working with wet foliage, and rotate brassica crops.

Downy Mildew

Downy mildew can develop during cool, humid conditions and may produce discoloured patches and fungal growth on leaves.

Prevention: Provide adequate spacing, improve air circulation, and avoid prolonged leaf wetness where possible.

Caribou Growing Note: Protect Young Plants Early

Fine insect netting installed immediately after sowing or transplanting can prevent many common cabbage pests from reaching bok choy. Secure the edges and inspect plants before covering them so insects are not trapped underneath.

Common Bok Choy Growing Problems

Why Is My Bok Choy Growing Tall?

If the centre of the plant stretches upward and begins producing flower buds, the plant is bolting. Harvest promptly while the leaves and stalks remain usable.

If the plant is simply upright without flowering, this may be its normal growth habit. Check the variety description before assuming there is a problem.

Why Is My Bok Choy Small?

Small plants may result from overcrowding, insufficient light, poor fertility, irregular watering, or inadequate growing time.

Remember that Toy Choy is naturally miniature and should not be expected to grow as large as Bopak.

Why Are My Bok Choy Leaves Yellow?

Yellowing leaves may result from natural ageing, poor drainage, nutrient deficiency, water stress, or root problems.

Check soil moisture and inspect the plant before adding fertilizer.

Why Are There Holes in My Bok Choy Leaves?

Small scattered holes are often caused by flea beetles, while larger irregular holes may indicate caterpillars or slugs.

Inspect both sides of the leaves and use suitable pest-management measures.

When and How to Harvest Bok Choy

Bok choy is ready to harvest when it reaches the expected size for its variety, with firm, crisp stalks and healthy, well-developed leaves.

Compact varieties may be ready in approximately 30–45 days, while larger varieties commonly require around 45–65 days. Maturity depends on the variety, planting method, and growing conditions.

Signs Bok Choy Is Ready to Harvest

• The plant has reached the expected mature size for its variety.
• The stalks are firm and crisp.
• The leaves are healthy and well developed.
• The plant has not begun forming a flower stalk.

Harvesting the Entire Plant

1. Choose a mature, healthy plant.
2. Use a clean, sharp knife.
3. Cut the plant at the base, just above soil level.
4. Remove damaged or yellowing outer leaves.
5. Wash carefully between the stalks before cooking.
6. Refrigerate promptly after harvesting.

Harvesting Individual Leaves

You can harvest a few mature outer leaves while leaving the central growing point intact. This allows the plant to continue producing leaves under suitable conditions.

However, if you want a substantial, full-size bok choy, harvesting the entire plant at maturity generally provides the best result.

Caribou Growing Note: Harvest Before Flowering

Check plants frequently as they approach maturity, particularly during spring. Once a flower stalk begins developing, leaf and stalk quality may decline. Harvest promptly rather than waiting for a larger plant.

How to Store Fresh Bok Choy

Bok choy is a tender leafy vegetable best enjoyed soon after harvesting. Unlike cabbage or rutabaga, it is not intended for long-term winter storage.

Refrigerator Storage

1. Remove damaged or yellowing leaves.
2. Leave the head intact until ready to use when possible.
3. Avoid washing before storage unless necessary.
4. Place in a loosely closed or perforated produce bag.
5. Store in the refrigerator's vegetable drawer.
6. Use within approximately 3–7 days for the best quality.

Freezing Bok Choy

Bok choy can be frozen for cooked dishes, although its crisp texture will soften after thawing.

1. Wash thoroughly, separating stalks to remove trapped soil.
2. Cut into evenly sized pieces.
3. Blanch in boiling water for approximately two minutes for small pieces.
4. Cool immediately in ice water.
5. Drain thoroughly.
6. Pack in freezer-safe containers or bags and freeze promptly.

Frozen bok choy is best used in soups, stews, and other cooked recipes.

How to Use Bok Choy in the Kitchen

Both the stalks and leaves of bok choy are edible. The stalks have a crisp, juicy texture, while the leaves are tender and cook quickly.

For stir-fries, add chopped stalks first and cook briefly before adding the leaves. Bok choy is also excellent steamed, sautéed with garlic and ginger, or added to soups and noodle dishes.

Smaller Toy Choy heads are particularly convenient for cooking whole or halved, while larger Bopak plants can be chopped into separate stalk and leaf portions.

Frequently Asked Questions About Growing Bok Choy

Can you grow bok choy in Canada?

Yes. Bok choy grows well in many Canadian regions when planted during suitable mild-weather periods, particularly in spring and autumn.

When should I plant bok choy in Canada?

Plant during mild spring weather after the risk of prolonged chilling has diminished, or sow in midsummer to late summer for an autumn harvest.

Is autumn better than spring for growing bok choy?

Often, yes. Shortening days and gradually cooling temperatures can reduce bolting problems and provide more reliable growing conditions.

How deep should I plant bok choy seeds?

Sow seeds approximately 0.5–1 cm deep.

How long does bok choy take to germinate?

Seeds generally germinate within approximately 4–10 days under favourable conditions.

Can I start bok choy indoors?

Yes. Start seeds approximately 3–4 weeks before transplanting, and move seedlings outdoors while they are still young.

How far apart should bok choy plants be?

Space larger varieties such as Bopak approximately 25–35 cm apart. Compact varieties such as Toy Choy can generally be grown at closer spacing, around 15–20 cm.

What is the difference between Bopak and Toy Choy?

Bopak is suitable for larger mature harvests, while Toy Choy is a naturally compact variety intended for smaller heads.

Why is my bok choy bolting?

Bolting may result from prolonged cold exposure followed by warming conditions, long days, high temperatures, drought, or other growing stresses.

Can I stop bok choy from bolting?

Once a flowering stalk begins developing, bolting generally cannot be reversed. Harvest promptly while the plant remains usable.

Can bok choy survive frost?

Established plants may tolerate light frost, but prolonged freezing can damage leaves and stalks. Extended chilling can also increase the risk of premature flowering.

Does bok choy need full sun?

Bok choy grows well in full sun to partial shade. Approximately 4–6 hours of direct sunlight can support growth, while light afternoon shade may help during hot weather.

Can bok choy grow in containers?

Yes. Use containers with good drainage and sufficient room for mature plants. Compact Toy Choy is particularly suitable.

Why is my bok choy not getting bigger?

Possible causes include overcrowding, insufficient sunlight, poor fertility, water stress, or growing a naturally compact variety.

How do I know when bok choy is ready to harvest?

Harvest when the plant reaches its expected mature size, with crisp stalks and healthy leaves, before flowering begins.

Can you eat bok choy after it bolts?

Yes, if the plant remains healthy, although leaves and stalks may become tougher or more bitter.

Can bok choy be harvested more than once?

Individual outer leaves can be harvested while leaving the central growing point intact. For full-size heads, harvesting the entire plant is generally preferable.

How long does fresh bok choy last?

Refrigerated bok choy is generally best used within approximately 3–7 days.

Grow Bok Choy from Seed

Bok choy is an excellent vegetable for Canadian gardeners who want quick, productive harvests during the cooler parts of the growing season. By choosing the right variety, planting at the appropriate time, maintaining consistent moisture, and protecting young plants from pests, you can enjoy fresh, crisp bok choy straight from your garden.

For larger mature heads, choose Bopak. For compact harvests in containers or smaller gardens, Toy Choy is a practical alternative.

Featured Bok Choy Seeds

	Bopak Bok Choy Bopak produces crisp white stalks and tender green leaves. It can be harvested young or grown to a larger mature size. Excellent for stir-fries, soups, steaming, and fresh cooking.
	Toy Choy Bok Choy Toy Choy is a miniature white-stemmed bok choy with dark green leaves. Its compact growth makes it ideal for containers, small gardens, and individual-serving harvests.

Download | How to Grow Bok Choy in Canada | Complete Growing Guide (PDF)

See You in the Garden!