How to Grow Pak Choi in Your Garden

Do you know how to grow pak choi? Funnily enough, it is one of the easiest oriental vegetables to grow in British gardens, yet it remains underutilised by home growers. I started experimenting with pak choi after visiting a community allotment in Bristol where the plots were bursting with these glossy green plants, and I’ve been hooked ever since. This Asian brassica thrives in our cool, damp climate and grows remarkably quickly, often ready to harvest just six to eight weeks after sowing.

What makes pak choi particularly appealing for British gardeners is its versatility. You can grow it almost year-round with proper planning, it tolerates partial shade better than many salad crops, and it occupies minimal space. I’ve successfully grown pak choi in everything from traditional vegetable beds to containers on a balcony in Edinburgh. The flavour is mild yet distinctive, with crisp white stems and tender dark green leaves that work brilliantly in stir-fries, soups, or simply steamed with a bit of garlic.

Whether you’re looking to add variety to your vegetable plot or want a fast-growing crop that delivers reliable results, pak choi deserves serious consideration. This guide covers everything I’ve learnt through trial and error, including the mistakes that cost me entire crops when I first started.

What You’ll Need

Getting started with pak choi doesn’t require any specialised equipment, which is part of its appeal. The essentials are straightforward, though choosing quality materials makes a noticeable difference to your success rate.

Seeds and Growing Medium

You’ll need pak choi seeds from a reputable supplier. I’ve found that named varieties like ‘Canton Dwarf’ or ‘Joi Choi’ perform more consistently than generic packets, though both work. For the growing medium, a good multipurpose compost works perfectly for container growing. If you’re sowing directly into the ground, your soil should be reasonably fertile with decent drainage. I always add a layer of garden compost or well-rotted manure to my beds a few weeks before planting, which pak choi absolutely loves.

Seed trays or modules are useful if you prefer starting plants indoors, though direct sowing works brilliantly too. I use 9cm pots for starting individual plants, which gives them enough room to develop a proper root system before transplanting. You might also find from seed to salad: my guide to growing proper cucumbers helpful.

Location and Space Requirements

Pak choi needs a spot with good light, though it tolerates partial shade better than tomatoes or peppers. I’ve successfully grown it under apple trees where it receives dappled sunlight for most of the day. Each plant needs roughly 15-20cm spacing in all directions, so you can fit quite a few into a small bed. A square metre can comfortably accommodate 16 to 25 plants, depending on the variety.

For containers, anything with drainage holes and at least 15cm depth works. I’ve used everything from purpose-built planters to old washing-up bowls with holes drilled in the bottom. The key is ensuring water doesn’t sit around the roots, which pak choi detests.

Step-by-Step Instructions

Growing pak choi successfully relies on timing your sowings correctly and providing consistent moisture. I’ve broken down the process into manageable stages that have worked reliably across different parts of the country.

When to Sow

Timing is genuinely critical with pak choi because it’s prone to bolting (running to seed prematurely) during long summer days. I’ve had my best results with two distinct growing periods. The first is early spring, from late February through April, when you can sow under cloches or in a cold frame. These plants mature before the longest days arrive. The second period runs from late July through September for autumn and early winter harvests.

In my experience, avoiding sowings from May through early July prevents most bolting problems. The exception is if you’re growing bolt-resistant varieties, which give you more flexibility. I tested this at an allotment in Norwich, sowing every fortnight throughout summer, and the mid-summer sowings bolted within three weeks whilst spring and autumn crops thrived.

Sowing Methods

You can either sow directly where plants will grow or start them in modules for transplanting. Direct sowing saves time and avoids transplant shock, but modules give you better control and protection from pests during the vulnerable seedling stage.

For direct sowing, prepare your soil by raking it to a fine texture and removing stones and debris. Create shallow drills about 1cm deep and 20cm apart. Sow seeds thinly along the drill, aiming for one seed every 2-3cm. Cover lightly with soil and water gently. When seedlings have two true leaves, thin them to final spacing of 15-20cm apart. Don’t waste the thinnings, they’re delicious in salads.

For module sowing, I place two or three seeds per cell and thin to the strongest seedling once they germinate. Pak choi germinates quickly, usually within five to seven days at temperatures above 10°C. Keep the compost moist but not waterlogged. Transplant when seedlings have four to six true leaves, typically three to four weeks after sowing.

Soil Preparation and Planting

Pak choi belongs to the brassica family, so it appreciates fertile, slightly alkaline soil. I always check my soil pH and add garden lime if it’s too acidic, aiming for pH 6.5 to 7.5. The plants are hungry feeders, so I work in plenty of organic matter before planting.

When transplanting module-grown seedlings, water them thoroughly an hour beforehand. Dig holes slightly larger than the root ball, spacing them 15-20cm apart in rows 20cm apart. Firm the soil gently around each plant and water well. I learned the hard way that loose planting leaves plants vulnerable to being pulled up by birds or wind.

Ongoing Care and Maintenance

Consistent watering is absolutely vital for pak choi. These plants grow rapidly and any check in growth from drought causes them to bolt or turn bitter. I water deeply two or three times weekly during dry spells, ensuring the soil stays evenly moist. Mulching around plants with compost or grass clippings helps retain moisture and suppresses weeds.

Feeding isn’t usually necessary if you’ve prepared the soil well, though I sometimes apply a liquid feed high in nitrogen every couple of weeks if plants look pale. Be careful not to overfeed, which can make leaves tough.

Pest Protection

This is where pak choi growing can become frustrating. As a brassica, it’s targeted by the usual suspects: flea beetles, caterpillars, slugs, and pigeons. I’ve found that covering crops with fine mesh netting from the moment you sow or transplant prevents most problems. The netting needs to be secure at ground level because flea beetles are determined little things.

Flea beetles are particularly troublesome on young plants, creating tiny holes that can devastate seedlings. I’ve had entire crops riddled with holes at an allotment in Manchester before I started using mesh covers. The beetles are less problematic in autumn when temperatures drop.

Slugs can demolish young pak choi overnight. I use a combination of barriers (copper tape around containers), traps (beer traps or upturned grapefruit halves), and night-time patrols with a torch. Biological controls work well if soil temperatures are suitable.

Harvesting

Most pak choi varieties are ready six to eight weeks after sowing, though you can start harvesting baby leaves earlier. I usually harvest whole plants by cutting at ground level, which works well for dense sowings. Alternatively, you can pick outer leaves and allow the plant to continue producing, though I’ve found this only works for a couple of harvests before plants decline.

The best indicator of readiness is size and appearance rather than time. Plants should have formed a compact rosette of leaves with thick, crisp stems. If you see a central flowering stem emerging, harvest immediately as the leaves will turn bitter once flowering starts.

Common Mistakes to Avoid

I’ve made plenty of errors growing pak choi over the years, and watching other allotment holders, I’ve noticed several mistakes crop up repeatedly.

Sowing at the Wrong Time

This is the single biggest cause of failure. Sowing during late spring and early summer almost guarantees bolting, wasting your time and seeds. I wasted an entire packet of seeds and several weeks before I understood the relationship between day length and bolting. Stick to early spring or late summer sowings unless you’ve specifically chosen bolt-resistant varieties, and even then, results can be mixed.

Inconsistent Watering

Pak choi needs steady moisture throughout its growing period. I’ve seen plants go from lush and healthy to bolted and bitter within days during a dry spell. Irregular watering also makes stems stringy and leaves tough. If you’re growing in containers, this becomes even more critical as they dry out faster than beds. I check container-grown pak choi daily during warm weather.

Inadequate Pest Protection

Leaving young pak choi unprotected is asking for trouble. I’ve watched neighbours lose entire crops to flea beetles and caterpillars whilst my mesh-covered plants thrived. The effort of installing netting properly is minimal compared to the disappointment of finding your crop reduced to lace. Don’t assume you’ll spot and control pests early enough, by the time you notice serious damage, it’s often too late.

Overcrowding Plants

It’s tempting to squeeze in extra plants, especially when space is limited. I did this on a small balcony plot, spacing plants at 10cm instead of the recommended 15-20cm. The result was weak, spindly plants competing for light and nutrients, and increased disease pressure from poor air circulation. Proper spacing produces healthier, more productive plants even if you have fewer of them.

Ignoring Crop Rotation

Because pak choi is a brassica, it shouldn’t be grown in the same spot where you’ve recently had cabbage, broccoli, kale, or other family members. I learned this when plants in my brassica bed developed clubroot, a soil-borne disease that persists for years. Follow a proper crop rotation, leaving at least three years between brassicas in the same location.

Expert Tips

These are the techniques and observations that have genuinely improved my pak choi harvests, many learned through conversations with experienced growers across different regions.

Choose the Right Varieties

Not all pak choi is created equal. I’ve had far better results with varieties specifically bred for British conditions or bolt resistance. Dwarf varieties work brilliantly in containers and mature faster, whilst larger types produce heavier harvests. Baby pak choi varieties are ready in as little as four weeks and are less prone to pest damage simply because they’re harvested before problems escalate.

At an allotment open day in Cornwall, I met a grower who’d trialled a dozen varieties and found that ‘Canton White’ and ‘Ruffles’ consistently outperformed others for flavour and reliability. It’s worth experimenting to find what works in your specific location.

Succession Sowing

Rather than sowing all your seeds at once, I sow small batches every two weeks during the appropriate seasons. This provides a continuous harvest rather than a glut followed by nothing. I typically sow a dozen plants at a time, which is plenty for my household and gives me fresh pak choi for months.

Intercropping and Companion Planting

Pak choi grows well between slower-maturing crops. I’ve successfully grown it between rows of Brussels sprouts and alongside lettuce. The quick-growing pak choi is harvested before the larger crops need the space. Some growers report that planting aromatic herbs nearby helps deter pests, though I’ve had mixed results with this. What definitely works is mixing pak choi with crops that don’t attract the same pests, reducing overall pressure.

Container Growing Advantages

Whilst you can certainly grow pak choi in beds, containers offer real advantages. You have complete control over the growing medium, making it easier to maintain consistent moisture. Containers can be moved to optimise light conditions or protect from harsh weather. I’ve also found that elevating containers on bricks or stands reduces slug damage significantly.

For balcony or patio growing, pak choi is genuinely one of the best choices. It doesn’t need full sun all day, grows quickly, and looks attractive with its glossy foliage. I’ve had excellent results in 25cm diameter pots, growing three plants per container.

Extend the Season

With protection, you can harvest pak choi well into winter. I use cloches or fleece to protect autumn sowings from frost, which extends my harvest from October through to December in most years. The plants tolerate light frosts well, and some growers claim frost improves flavour, though I haven’t noticed a significant difference.

In spring, starting seeds indoors or under cover in February gives you harvests by April, weeks before outdoor sowings would be ready. This early crop is particularly welcome when few fresh vegetables are available from the garden.

Frequently Asked Questions

Can I grow pak choi indoors on a windowsill?

Yes, you can grow pak choi indoors, though it needs good light to thrive. A south-facing windowsill works well, or you can use grow lights if natural light is limited. I’ve successfully grown baby pak choi varieties in shallow trays on a kitchen windowsill during winter, harvesting leaves at about three weeks. The main challenges are maintaining consistent moisture and ensuring adequate light, as plants become leggy and weak in poor conditions. Ventilation is also important to prevent damping off, a fungal disease that affects seedlings in stagnant air. Indoor growing works best for baby leaf harvests rather than full-sized heads.

Why does my pak choi keep bolting?

Bolting occurs when plants switch from leaf production to flowering, usually triggered by long day length combined with temperature stress. Pak choi is particularly sensitive to bolting during late spring and summer when days are longest. The best prevention is timing your sowings for early spring or late summer through autumn. Other factors that trigger bolting include irregular watering, transplant shock, and root disturbance. Some varieties are more bolt-resistant than others, so choosing appropriate cultivars helps. If plants do start bolting, harvest immediately as leaves quickly turn bitter once flowering begins.

How do I deal with flea beetle damage on pak choi?

Flea beetles are tiny jumping insects that create numerous small holes in leaves, particularly on young plants. The most effective control is prevention through physical barriers. Covering crops with fine mesh or fleece from sowing or planting prevents beetles from reaching plants. The covers can usually be removed once plants are more established and growing vigorously, as larger plants tolerate some damage better. Keeping soil moist helps because flea beetles prefer dry conditions. Some organic growers use sticky traps or diatomaceous earth around plants, though I’ve found these less reliable than mesh covers. Autumn sowings suffer less damage as beetle populations decline in cooler weather.

Can pak choi survive frost?

Pak choi tolerates light frosts down to about minus two or three degrees Celsius, though prolonged freezing will damage or kill plants. I’ve had autumn crops survive several light frosts in October and November without protection, though growth slows considerably in cold weather. For extended harvests through winter, providing protection with cloches, cold frames, or fleece makes a significant difference. Plants under cover can continue growing slowly and withstand colder temperatures. If a hard frost is forecast and you have unprotected plants, harvesting everything is safer than risking losing the crop. Spring sowings under cover should also be protected from late frosts.

What’s the difference between pak choi and bok choy?

These are actually the same vegetable with different names. Pak choi is the Cantonese pronunciation whilst bok choy is an alternative transliteration of the same Chinese characters. You might also see it called Chinese cabbage or Chinese white cabbage, though this can cause confusion with other Asian brassicas. There are different varieties within the pak choi family, including baby pak choi, dwarf forms, and larger types with different stem colours ranging from white to purple. The growing requirements are essentially identical regardless of what name appears on the seed packet.

How much pak choi should I plant for a family?

This depends on how often you eat it, but I’ve found that eight to twelve plants maturing at once provides plenty for a family of four for a week, using it in several meals. Because pak choi grows quickly and doesn’t store particularly well after harvest, succession sowing works better than growing large quantities at once. I sow twelve plants every two weeks during appropriate seasons, which gives a continuous supply without overwhelming us with more than we can use. If you’re new to growing pak choi, starting with six plants gives you enough to experiment with whilst learning what works in your garden.

Can I save seeds from pak choi plants?

Yes, though there are some considerations. Pak choi is biennial, flowering in its second year, though it often bolts and flowers in the first year if stressed. Allow a few plants to flower and set seed pods, which dry to a brown colour when ready. Collect the pods, dry them thoroughly, then split them open to release the small round seeds. The challenge is that pak choi cross-pollinates readily with other brassicas flowering nearby, so saved seeds might not grow true to type unless you isolate plants. I’ve saved seeds successfully, but I’ve also had odd results when plants were near flowering purple sprouting broccoli. For consistent results, buying fresh seeds annually is more reliable, though saving your own is certainly possible.

Conclusion

Growing pak choi has become one of my most reliable vegetable gardening activities, providing quick results and delicious harvests with minimal fuss. The key lessons I’ve learned are timing your sowings to avoid bolting, protecting plants from pests with mesh covers, and maintaining consistent moisture throughout the growing period.

What makes pak choi particularly suitable for British gardens is how well it tolerates our cool, damp conditions. Unlike Mediterranean vegetables that struggle without consistent warmth, pak choi positively thrives in the weather patterns we experience during spring and autumn. It occupies space for just six to eight weeks, making it perfect for filling gaps between other crops or growing in containers where space is limited.

The satisfaction of harvesting your own pak choi, knowing exactly how it’s been grown and getting it from garden to kitchen within minutes, genuinely improves both flavour and nutritional value compared to shop-bought alternatives. Start with a small sowing this season and you’ll quickly understand why this versatile Asian green deserves a place in every British vegetable garden.

Author: Megan Walker

Megan focuses on seasonal food, kitchen garden growing, and how households can reconnect with where their food comes from. Her writing blends practical growing advice with ideas for cooking and eating in season. With a passion for fresh ingredients and sustainable living, Megan’s articles help readers make the most of local produce while supporting British farms.