What to plant in May in New Zealand

May 6, 2026

May is the month your garden settles into autumn properly. The soil is cooling, the days are shorter, and the cool-season crops you put in this weekend will quietly carry you through winter and into spring. Half an hour on Saturday will pay you back for the next six months.

Two jobs matter more than anything else this May, wherever you live in New Zealand: sow broad beans, and get a row of silverbeet in the ground. Broad beans will produce from October and improve the soil while they grow. One good row of silverbeet will feed you for months. If you do nothing else this weekend, do those two.

This guide is refreshed each year with a current-season update. Scroll down for the May 2026 adjustments and the weekend-ahead forecast for your zone, then find your town.

This May (2026): what's different this year

Last updated 3 May 2026. At GrowBox, we compare current conditions against long-term averages to flag where this month's advice differs from the classic May playbook for your region.

April delt us two very different gardens across the two halves of the country.

If you're in the North Island (Kaitaia down through Wellington and Hawke's Bay), you're heading into May with saturated soil. Most North Island zones recorded close to double their usual April rainfall, and Hawke's Bay had its wettest April in years. That changes how you plant for the next few weeks. Don't work soggy ground. Mound your rows up, lean on raised beds where you have them. Mulch generally breaks down ot help soil structure and improve drainage. However, if it's soggy wet skip it.

If you're in Nelson or the upper South Island, the picture is the opposite. Nelson saw about half the rainfall of a typical April — gardens are starting May noticeably dry. Water new transplants in properly (a real soak, not a quick splash), mulch thickly to lock moisture into the root zone, and don't trust the sky to do the work for you.

For Christchurch and Canterbury, May 2026 is tracking a normal late autumn — and this weekend hands you the best gardening conditions anywhere in the country on Sunday. For Queenstown and the southern highlands, frosts are on schedule and the classic May playbook applies.

Everything below is your zone-by-zone weekend playbook, with this year's soggy/parched split baked in where it matters.

What to Plant in Kaitaia in May

The subtropical north has the longest growing season in the country, and May is still prime planting weather up here. Soils are cool but workable, frosts aren't a worry, and anything you put in this weekend will get a strong start before winter slows things down.

This weekend (9–10 May): patchy showers both days, on top of saturated soils from April's roughly double-the-usual rainfall. That's not a wash-out — Northland in May is rarely a sit-inside weekend. Plant between showers, mulch what you put in straight away, and stick to the better-drained beds. Don't work the lowest, soggiest patch of your garden until it's drained.

Get these in the ground:

Broad beans — sow direct, 3–4cm deep, 15cm apart, in rows 30cm apart. They'll handle the wet without complaint and they fix nitrogen, which means they're improving the soil for whatever you plant next. You'll be picking from October.
Silverbeet, lettuce and rocket — direct sow or transplant. One row of silverbeet will feed you through to spring. The wet autumn won't bother any of these, especially silverbeet.
Pak choi and other Asian greens — direct sow. Quick, cheerful, and four to six weeks from the seed packet to your kitchen.
Broccoli and cabbage — transplant well-grown seedlings, 50–60cm apart. With the soil this wet, transplants beat seeds — they're already up and away.
Garlic — if you didn't get it in during April, this is your last solid window up here. Plant cloves flat-end down, 5cm deep, 15cm apart, on a mounded row to keep them out of soggy ground.

Skip this month: The last of the summer crops. Pull spent tomato and capsicum plants, compost the healthy stuff, and free up that bed for winter greens while the soil is still warm enough to work.

What to Plant in Auckland in May

May in Auckland is the comfortable middle of autumn — cool, productive, and the right month to lock in the cool-season crops that will carry your garden through winter.

This weekend (9–10 May): both days are wet — Saturday around 17°C with rain, Sunday around 15°C with patchy rain on top of soils that are already saturated from April's well-above-normal rainfall. If you can't get out between showers, the better window is earlier in the week — Tuesday and Wednesday are forecast dry. Don't push it on a sodden Saturday afternoon if you've got a clean Tuesday morning available. If you're committed to the weekend, work a raised or mounded bed that's drained, and prioritise transplants over direct seed.

Get these in the ground:

Broad beans — direct sow now, 3–5cm deep, 15cm apart. The classic autumn job in Auckland. They handle the cool damp well and they'll feed you from October. Aquadulce Claudia and Crimson Flowered are both reliable.
Silverbeet and lettuce — sow direct or transplant. Silverbeet is set-and-forget for winter; one row plants you for months of picking.
Beetroot, carrot and radish — sow direct in well-drained, well-prepared soil. Given this autumn's wet pattern, prioritise raised or mounded rows for carrots — they hate sitting wet. Radishes are ready in three to four weeks.
Coriander and dill — sow a short row now, then succession sow every three to four weeks. Coriander behaves itself in cool weather in a way it never does in summer.
Pak choi — direct sow in any spare space. Quick and well-suited to the cooling weather.

Skip this month: Tomatoes, courgettes and the last of the warm-season holdouts. They've had their run. Clear the beds, compost the healthy bits, and put the space to better use.

What to Plant in New Plymouth in May

Taranaki's reliable autumn rain is a gift for cool-season crops, but it does mean drainage is the gardener's main job in May. Raised beds, mounded rows and good mulch earn their keep here every year.

This weekend (9–10 May): Saturday is your day. Mostly drier with a calmer feel; light rain doesn't really arrive until Sunday afternoon. Plant Saturday morning, mulch, then let Sunday's rain bed it all in. On top of April's well-above-normal rainfall, the soil is genuinely soggy already — build rows up where you're planting into heavy ground.

Get these in the ground:

Broad beans — the single most important May planting here. Sow direct, 3–4cm deep, in rows. They handle wet weather with no fuss and they'll be feeding you from October.
Kale and silverbeet — Taranaki's wet winters genuinely suit both. Transplant kale seedlings 40–50cm apart, and direct sow or transplant silverbeet. These two will be productive right through the cold.
Sugar snap or snow peas — sow a short row with a simple trellis. They'll tick along through winter and you'll be picking by late July or August.
Broccoli — transplant well-grown seedlings, 40–50cm apart. The bigger the root ball at planting, the better they'll handle the wet.
Lettuce, rocket and pak choi — direct sow or transplant. Pick a well-drained spot or a raised bed for these — they're shallow-rooted and don't love saturated soil.

Skip this month: Tomatoes, capsicum and cucumber. Done for the year. Harvest what's left, clear the beds, and reclaim the space for winter greens.

What to Plant in Wellington in May

May in Wellington is honest cool-season weather — frosts begin to nip in sheltered spots, the wind keeps doing what Wellington wind does, and the days are short. Strong, well-grown transplants beat freshly sown seedlings in exposed beds.

This weekend (9–10 May): chilly and breezy. Saturday around 12°C with a fresh southerly, Sunday similar with a softer southwest. No major rain forecast for the weekend itself, just standard Wellington autumn — cool, blustery and workable. Soils are above-normal moist after April; wait for a dry afternoon if your beds haven't drained, and stake new plantings well — Wellington wind is harder on a wobbly seedling than rain ever is.

Get these in the ground:

Broad beans — direct sow Aquadulce Claudia or Crimson Flowered, 4–5cm deep, in rows 30cm apart. Tough, reliable, and heavy producers from October.
Silverbeet and perpetual spinach — bullet-proof in Wellington conditions. Put a row in now and it'll still be going strong come spring.
Broccoli and cabbage — transplant well-grown seedlings (the bigger the root ball, the better they handle the wind). Space 50–60cm apart.
Leeks — plant seedlings 15cm apart in a shallow trench and backfill as they grow. They'll sit through winter quietly, ready from July onwards.
Lettuce and rocket — sow or transplant in a sheltered spot. Loose-leaf lettuces beat hearting types from May onwards — you can pick a few leaves at a time without losing the plant.

Skip this month: The last of the basil and any summer holdouts. They're not coming back. Clear the beds and put the soil to better use.

What to Plant in Napier in May

Hawke's Bay normally has one of the warmest, driest Mays in the country — light free-draining soils, good sunshine hours, and crops that thrive in the dry. May is usually a comfortable, productive month here.

This weekend (9–10 May): plant Saturday morning. Saturday starts with showers but calmer winds — workable in the morning. Easterly gales build Sunday afternoon and evening, with the heaviest rain Sunday night. That's not the kind of weather you want to plant a fresh seedling into. Get your jobs done before midday Saturday, mulch what you plant, and stake anything new straight away — anything not anchored will be tested. On top of April's well-above-normal rainfall, soils are still wetter than usual for Hawke's Bay.

Get these in the ground:

Broad beans — sow direct, 3–4cm deep. Hawke's Bay's mild May means good germination and solid root development before winter. Sow Saturday morning, mulch immediately.
Broccoli and cauliflower — transplant seedlings Saturday morning. Stake them straight away and tie loosely with soft string — Sunday's gales will test anything that isn't well anchored.
Silverbeet and leafy greens — direct sow or transplant. Silverbeet will keep producing through winter with almost no input. Plant in a sheltered spot if you have one.
Coriander, parsley and dill — sow now. Parsley is slow to germinate — soak seeds for 24 hours first to speed things up.
Spring onions and overwintering onions — direct sow spring onions thickly for continuous picking. Plant overwintering onion seedlings 10cm apart for a mid-summer harvest.

Skip this month: Pumpkin, courgette and cucumber. Their season is done. If pumpkins are still on the vine, cut them and cure them in a warm spot — they won't size up further from here.

What to Plant in Nelson in May

Nelson is one of the best gardening climates in the country and May is a comfortably productive month here — typically sunny, mild and well-watered, with a light frost or two arriving by the end of the month.

This weekend (9–10 May): rain both days with breezy northerlies. After April's unusually dry month — only about half a typical April's rainfall — that rain is welcome moisture for thirsty soils. If you wanted a dry, clean planting session, the better window was Tuesday to Thursday earlier in the week. This weekend is more about letting the rain do the watering for any transplants you put in mid-week, or planting between showers if you didn't manage one. Either way, mulch thickly to hold the moisture once it lands.

Get these in the ground:

Broad beans — sow direct, 3–4cm deep. Nelson's mild winters mean they'll be well ahead by the coldest months, producing from October through December. The weekend rain will bed them in for free.
Sugar snap or snow peas — prime pea-planting time. Sow direct and put a simple trellis in at the same time.
Broccoli and cauliflower — transplant seedlings, 50–60cm apart. Your winter workhorses. Plant between showers and let the rain do the watering-in.
Beetroot, carrot and radish — sow direct. Radishes in three to four weeks; carrots and beetroot from late winter through spring.
Garlic — if you missed the April window, this weekend is your last good shot in Nelson. Plant cloves 5cm deep, 15–20cm apart, then mulch with straw. The weekend rain will wake the cloves up properly — exactly what they need after a dry month.

Skip this month: Summer squash, courgette and cucumber. If a bed is heading into winter empty, sow a cover crop — mustard, phacelia or a mixed blend — to feed the soil while it rests.

What to Plant in Christchurch in May

Canterbury's May is straightforward cool-season territory. Frosts are biting in the mornings, the soil is cooling fast, and the direct-sowing window for many crops is closing.

This weekend (9–10 May): Sunday is the day. Saturday is showery and gusty (winds up to 66 km/h, 3–6mm of rain), but Sunday is mostly sunny, around 16°C with a light south-southwesterly — the best gardening conditions anywhere in the country this weekend. Make Sunday morning your planting session. Coffee, gloves, an hour or two with the seedlings — it's a gift weekend for Canterbury and the only one you'll see for a while.

Get these in the ground:

Broad beans — sow Aquadulce Claudia Sunday for a December harvest. It's the classic Canterbury variety and reliably productive in cold conditions. Sow 4–5cm deep, in rows 30cm apart.
Broccoli, cabbage and kale — transplant seedlings Sunday. Savoy cabbage and Cavolo Nero kale both shrug off Canterbury winters without complaint. Frost actually improves the flavour of kale.
Silverbeet and pak choi — direct sow. Sunday's mild conditions give germination a real boost — Canterbury soils are cooling toward the slow-germination zone, but a sunny day and a watered-in row will get you up and away.
Spinach — direct sow a sheltered row. Tougher than lettuce and a better cool-season pick.
Overwintering onions — plant sets or seedlings now for a mid-summer harvest. Canterbury's conditions suit them perfectly.
Garlic — if April slipped past you, plant Sunday. Mild conditions are forgiving. Use a hardneck variety like Purple Stripe or German Red, 5–6cm deep, and mulch straight after planting.

Skip this month: Potatoes, kumara, sweetcorn and anything frost-tender. Sunday's mild day doesn't change the cold mornings — soil is too cold for tubers to establish reliably, and the warm-season window has closed.

What to Plant in Queenstown in May

Queenstown in May is cold and serious — frosts are biting, the growing window is short, and only the toughest cool-season plants are worth your effort. That's not a downside; the crops that suit this climate are some of the best-tasting vegetables you'll ever grow.

This weekend (9–10 May): highs around 11–12°C, lows close to zero, and frosts both mornings. Don't plant first thing — wait for the frost to clear and the sun to warm the bed (mid-morning is usually fine). Water in only with lukewarm water (cold tap water shocks roots in chilled soil), and mulch immediately after planting to insulate the soil before the next frost lands.

Get these in the ground:

Broad beans — sow direct, 4–6cm deep, on a mounded row. They'll slow through the coldest months, then take off again in spring. Mulch well after sowing.
Kale — Dwarf Blue Curled Scotch and Cavolo Nero are both genuinely cold-hardy. Kale tastes better after a frost, and Queenstown is exactly the right climate for it. Transplant seedlings 40cm apart.
Spinach — direct sow under a cloche or cold frame. A sheltered spot extends your harvest deep into winter.
Garlic — if you missed April, get the last of it in this weekend. Plant cloves 6–7cm deep on a mounded row, mulch thickly with straw straight after planting. A cold-tolerant hardneck like Purple Stripe or Rocambole handles your winter best.
Silverbeet — transplant seedlings rather than sowing seed direct — soil is cooling fast and seed germination will be slow. Once established, silverbeet will hold through winter.

Skip this month: Anything that isn't frost-hardy. Tomatoes, capsicum, kumara, pumpkin and sweetcorn are all out. Put your effort into the four crops above — they'll repay you well right through the cold months.

May spotlight: Broad beans

If garlic was April's quiet hero, broad beans are May's. They're the easiest, toughest, most generous winter crop you can plant — and they make the soil better while they grow.

Broad beans fix nitrogen. In plain English: their roots pull nitrogen out of the air and lock it into the soil, which means whatever you plant after them gets a free feed. Plant a row this weekend and your spring tomatoes will thank you. Few crops give you both a harvest and a soil improvement in the same job.

The basics are simple. Sow seeds 3–5cm deep, 15cm apart, in rows 30cm apart. Most of the country can sow direct outside; in Queenstown and Canterbury, mound the row up and mulch well to insulate the soil. Aquadulce Claudia is the classic NZ variety — bullet-proof, cold-tolerant and reliably heavy. Crimson Flowered is another good pick if you want the prettiest broad bean patch in your street.

Once they're up, broad beans are about as low-maintenance as gardening gets. They'll grow slowly through the cold months, throw flowers from August or September, and be ready to pick from October. A short stake and a string line as they grow keeps them upright in wind. That's it.

For this weekend specifically: if you're in Christchurch, Sunday is the day — go. If you're in Hawke's Bay, sow Saturday morning before the gales. If you're in Auckland and the rain wins out, the broad bean seeds keep — sow them Tuesday or Wednesday instead. Everywhere else, between showers Saturday morning is the routine plan.

A handful of seeds this weekend, and you'll be picking your own broad beans for risotto come October. That's a fair trade.

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