Buying Chinese Broccoli Seeds to Grow Your Own Thai Cooking Greens

Chinese broccoli seeds are sold by garden centres, hardware chains with garden sections such as Bunnings in Australia and New Zealand, online seed suppliers and some Asian grocery stores. The plant goes by several names, so check packets for Chinese broccoli, gai lan, kai lan or Chinese kale. In Thai kitchens the same vegetable is called pak kana. It is the thick-stemmed, blue-green leafy vegetable in stir-fries like pad kana moo krob and noodle dishes like pad see ew. If you grow it from seed, you can pick it young and tender, which is how many Thai recipes like it.

What Are Chinese Broccoli Seeds and What Names Should You Look For?

Chinese broccoli seeds are the seeds of Brassica oleracea (Alboglabra group), a leafy relative of broccoli, cabbage and kale grown for its stems, leaves and flower buds. The seeds look like most cabbage-family seeds. They are tiny, round and dark brown to almost black, small enough that a pinch holds dozens.

The plant has many names, so one store may file it under a different label from the next. These names usually refer to the same vegetable:

• Chinese broccoli: the common English name on seed racks.
• Gai lan or kai lan: Cantonese names, often used by specialist seed suppliers.
• Chinese kale: an older English name. Gai lan seeds and Chinese kale seeds are generally the same crop.
• Pak kana (also spelled phak khana): the Thai name, used in recipes more than on seed packets.
• Kailaan or kailan: spellings common in Southeast Asian markets.

If a packet shows the botanical name Brassica oleracea var. alboglabra or Alboglabra group, you have the right plant, whatever the common name says.

Where Can You Buy Chinese Broccoli Seeds?

The main places to buy Chinese broccoli seeds are garden centres, hardware stores with garden departments, online seed suppliers, Asian grocers and community seed swaps. Each option has its own trade-off between convenience, range and how much the packet tells you.

Where to buy	What to expect	Good for	Limitations
Hardware chains such as Bunnings	Seed packets from mainstream garden brands on seasonal racks	Buying seeds while picking up soil, pots and tools	Range changes by store and season, and Asian greens may be limited
Independent garden centres	Broader seed racks and staff who know local conditions	Advice on when to sow in your area	Stock depends on the shop, and specialist varieties may need ordering
Online seed suppliers	The widest choice, including named varieties, white- and yellow-flowered types and larger packets	Comparing varieties and finding gai lan out of season locally	Postage time, plus seed import rules if ordering across borders
Asian grocery stores	Packets sometimes labelled in Chinese, Thai or Vietnamese	Varieties popular in Asian home cooking	Sowing instructions may not be in English or suited to your climate
Seed swaps and community gardens	Seeds saved by other growers	Low cost and locally grown plants	Brassicas cross easily, so saved seed may not grow true to type

Can You Buy Chinese Broccoli Seeds at Bunnings?

Bunnings sells vegetable seed packets from several garden brands, and Chinese broccoli or gai lan sometimes appears among them, but availability varies by store, region and time of year. When searching for Chinese broccoli seeds at Bunnings, these steps save a wasted trip:

1. Search the Bunnings website for Chinese broccoli, then try gai lan and Asian greens, because product names differ between brands.
2. Set your local store on the website to see whether the packet is in stock there or only available online.
3. In store, check the seasonal seed stand in the garden section. Asian greens are often grouped together or mixed in with other brassicas.
4. Look for mixed Asian greens packets too. Some include gai lan alongside bok choy and other leafy greens, but check the contents if you want gai lan alone.
5. If your store has none, try an independent garden centre or an online seed supplier, which usually carry a wider range of Asian vegetables.

What to Check When Chinese Broccoli Seeds Are for Sale Online

When buying Chinese broccoli seeds online, confirm the plant name, the variety, the packing or use-by date and whether the seller can legally ship seeds to your address. Online listings vary a lot in detail. Look for:

• Clear naming: Chinese broccoli, gai lan or Chinese kale, ideally with the botanical name.
• Flower colour: white-flowered gai lan is the most widely grown. Yellow-flowered types also exist and look closer to choy sum.
• Packed-for or sow-by date: fresher seed is more likely to germinate well.
• Sowing guidance for your climate: reputable seed suppliers list sowing months by region.
• Shipping rules: countries such as Australia and New Zealand have strict biosecurity rules for imported seed. Buying from a domestic supplier avoids parcels being held or destroyed.

How to Find Chinese Broccoli Seeds Near Me

To find Chinese broccoli seeds near you, start with the online stock checkers of nearby hardware stores and garden centres, then try local Asian grocers and community gardens. A practical order is:

1. Check the websites of the nearest hardware chains and garden centres for in-store stock.
2. Phone independent garden centres and ask for gai lan or Chinese broccoli by both names.
3. Visit Asian grocery stores, where seed packets are often kept near the till or with the dried goods.
4. Ask at community gardens or local gardening groups, where growers may share spare seed or seedlings.
5. If nothing turns up locally, order from a domestic online seed supplier.

How Do You Tell Chinese Broccoli Apart from Similar Greens?

Chinese broccoli has thick, smooth, waxy blue-green leaves, sturdy pale-green stems and small clusters of mostly white flower buds, unlike the tight green head of ordinary broccoli. Several look-alikes sit next to it on seed racks, and picturing the grown plant helps you buy the right packet.

Green	Looks like	Texture and flavour	How it differs from gai lan
Chinese broccoli (gai lan, pak kana)	Broad, flat, matte blue-green leaves with a waxy bloom, thick round stems and small bud clusters	Crisp, juicy stems and slightly bitter, cabbage-like leaves that turn sweeter when cooked	This is the reference plant
Western broccoli	One large, tightly packed green head on a thick trunk	Dense florets and a mild, grassy taste	Grown mainly for the head, while gai lan is eaten stems, leaves and all
Broccolini	Long slender stems with small loose florets and few leaves	Tender and sweet, with little bitterness	A hybrid of broccoli and gai lan, with thinner stems and much less leaf
Choy sum	Bright green, softer leaves and slim stems topped with yellow flowers	Tender and mildly sweet	A different species (Brassica rapa) that is lighter green and less waxy
Curly kale	Frilly, ruffled dark leaves on tough ribs	Chewy and earthy	Ribs are usually too tough to eat like gai lan stems

How Is Chinese Broccoli Used in Thai Cooking?

In Thai cooking, Chinese broccoli (pak kana) is mostly stir-fried over high heat with garlic and savoury sauces, so the stems stay crunchy and the leaves wilt to a glossy dark green. Raw, it smells fresh, green and faintly mustardy, like cut cabbage. In a hot wok the garlic sizzles, the leaves deepen in colour and the gentle bitterness balances salty, sweet sauces.

Thai Dishes That Feature Pak Kana

• Pad kana moo krob: Chinese broccoli stir-fried with crispy pork belly, garlic, chilli and oyster sauce. The pork crackles, the stems snap and the sauce coats everything in a shiny brown glaze.
• Pad see ew: wide, flat rice noodles stir-fried with dark soy sauce, egg and pieces of Chinese broccoli. The dark soy gives the noodles smoky, caramelised edges, and the gai lan adds crunch and a green, slightly bitter contrast.
• Rad na: wide rice noodles under a thick, glossy gravy with meat and Chinese broccoli. The greens soften into the silky sauce but keep some bite.
• Simple pak kana stir-fry: just the vegetable, garlic, chilli and sauce, served as a side with rice.

Sauces and Tools Used with Chinese Broccoli

The usual partners for pak kana are oyster sauce, fish sauce, soy sauces, garlic and chilli, cooked in a wok. Each brings something different:

• Oyster sauce: thick, glossy and dark brown, with a savoury-sweet depth. It gives the shiny coating you see on restaurant stir-fried greens.
• Fish sauce: a thin, clear amber liquid with a strong salty, fermented smell that mellows when cooked. It adds saltiness and savoury flavour.
• Dark sweet soy sauce: almost black and syrupy, with a molasses-like sweetness. In pad see ew it supplies colour and caramel notes.
• Light soy sauce: thinner and saltier, for seasoning without darkening the dish much.
• Garlic and bird's eye chillies: smashed or chopped garlic and small, fiery red or green chillies go into the hot oil first to scent it.
• Wok and wok spatula: the wok's curved, wide surface lets you toss the greens quickly over high heat, so they sear rather than stew. A large frying pan works if you cook in small batches.

Preparation Tips for Home-Grown Chinese Broccoli

1. Wash the stems and leaves well, since soil can collect where leaves join the stem.
2. Peel the tough outer skin from thick lower stems with a vegetable peeler.
3. Cut stems on a slant into bite-size pieces. Split very thick stems lengthwise so they cook through evenly.
4. Keep stems and leaves separate. Stir-fry the stems first, then add the leaves for the last minute or so.
5. Cook over high heat and add a splash of water if the wok looks dry, so the greens steam briefly without burning.

What Can You Substitute If You Cannot Grow or Buy Gai Lan?

The closest substitute for Chinese broccoli in Thai dishes is broccolini, followed by choy sum or peeled broccoli stems, though each changes the texture or flavour.

• Broccolini: similar crunch and shape, but sweeter and with far fewer leaves, so the dish loses some of its leafy, slightly bitter character.
• Choy sum: easy to find in Asian grocers and similar in use, but softer and milder. It cooks faster and does not stay as crisp.
• Broccoli stems and florets: peeled stems give crunch, but the florets soak up sauce differently and there is no broad leaf.
• Bok choy: juicy white stems and tender leaves that suit stir-fries, but the flavour is milder and the texture more watery.

Because good gai lan is not always available in shops, growing your own from a packet of seeds is a practical way to have fresh pak kana for Thai stir-fries and noodle dishes.

A Quick Guide from Seed Packet to Harvest

Chinese broccoli is a cool-season leafy crop. It grows best when sown in mild weather and is harvested when the flower buds form, before they open. Once you have your seeds:

1. Check the packet for the sowing months for your climate zone. Gai lan tends to bolt (flower too early) in hot weather.
2. Sow seeds shallowly, at about the depth the packet recommends, in a sunny bed or pot with rich, well-drained soil.
3. Keep the soil evenly moist while seeds germinate and seedlings establish.
4. Thin seedlings to the spacing on the packet so each plant can grow thick stems.
5. Harvest when the stems are thick and the first buds appear but are still closed. Cut the main stem and leave the base, which may send up smaller side shoots for later picking.

The days-to-harvest figure on the packet gives the best estimate for that variety, since timing varies with variety, season and growing conditions.