Seedlings · Swan Hill & the Mallee
Grow Your Own —
the Mallee Way.
Veggie and flower seedlings for Swan Hill's two growing seasons. We'll tell you what to plant, when to plant it, and how to keep it alive through the heat — because our summers are nothing like the planting guides were written for.
The Mallee Difference
Swan Hill Has
Two Growing Seasons.
Ignore the national planting guides
Most gardening guides are written for Melbourne or coastal climates. Swan Hill is a different beast — 40°C summers, frosts to May, 320mm of annual rainfall. Plant by the national calendar and you'll lose half your seedlings before Christmas.
The Mallee operates on a two-season model: a spring window from about September to November, and an autumn window from late February through April. Between those windows, summer is largely about protecting what's already in the ground — and winter is for the cold-season crops that thrive in the frost.
The trick is working with the rhythm of the season, not against it. Plant at the right time, water the right way, and give seedlings some help through the worst heat — and you'll grow more food than you'd expect.
September – November
Best for tomatoes, capsicum, cucumber, zucchini, beans, corn, basil, and eggplant. Plant after the last frost (typically early September) but aim to get established before the real heat hits in December.
Late February – April
As the heat eases, plant broccoli, cauliflower, cabbage, silverbeet, kale, lettuce, and Asian greens. These love the cooler months ahead and will power through to winter harvest.
May – August
Peas, broad beans, garlic, and root vegetables are frost-tolerant and actually grow better in the cold. Brassicas planted in autumn continue producing through these months.
December – February
Planting new seedlings in a Swan Hill summer is a battle. Protect anything already in the ground with shade cloth and deep mulching. Focus on established summer crops, not new transplants.
Swan Hill Planting Calendar
When to Plant What
Based on Swan Hill's actual frost dates and climate — not the national average. Last frost approx. early September · First frost approx. mid-May.
What We Stock
Seedlings in the Nursery
Oct – Nov
Oct – Nov
Sep – Nov
Oct – Nov
Oct – Nov
Oct – Nov
Mar – Apr
Feb – Apr
Mar – May
Apr – Aug
Mar – Apr
Apr – Jun
Oct – Nov
Year Round
Year Round
Mallee Seedling Survival Guide
Keeping Seedlings Alive
in the Swan Hill Heat
Swan Hill's summers are brutal on young plants. Here's what actually works — learnt through years of growing in this country, not from a gardening book written for Melbourne.
Plant in the Evening — Not the Morning
Transplanting seedlings into hot soil under the midday sun is a recipe for disaster. Plant in the evening — ideally after 5pm — so seedlings have the cool of the night to settle their roots before facing the next day's heat. Water in well immediately after planting.
Water Deeply and Infrequently
A light daily splash fools plants into growing shallow roots near the surface — the worst possible strategy in a Swan Hill summer. Water less often, but soak the root zone deeply when you do. This forces roots downward to where the soil stays cooler and moister.
Shade Cloth Is Not Optional in Summer
Tomatoes stop setting fruit above 38°C. Seedlings can die within hours in direct 42°C sun without shade. A 30–50% shade cloth frame over your vegetable bed through December and January isn't a luxury — it's the difference between a harvest and a write-off.
Mulch Before the Heat Arrives
A 75–100mm layer of mulch around your seedlings keeps the soil 5–10°C cooler, slows evaporation dramatically, and prevents the surface crust that stops water penetrating in heavy clay soils. Straw, lucerne, wood chip — any of them work. Just don't skimp on the depth.
Heatwave Protocol: Act Before the Day
When a 40°C+ day is forecast, prepare the evening before — not the morning of. Water deeply the night before, check shade cloth is in place, and if you have vulnerable seedlings, consider a temporary extra layer of shade. Once a seedling wilts badly in extreme heat, recovery is difficult.
Don't Rush the Spring Planting
Swan Hill's last frost typically lands in late August or early September — but unexpected late frosts into September are not unheard of. Tomatoes, capsicum, basil, and cucumber seedlings are frost-sensitive. Wait until after the last frost date and watch the five-day forecast before putting warm-season crops in the ground.
Heat Stress Guide
What Happens to Your Crops
When It Gets Hot
Different crops have different heat tolerance thresholds. Knowing these helps you prioritise protection on extreme heat days.
| Crop | Handles heat up to | What goes wrong above that | Swan Hill advice |
|---|---|---|---|
| Capsicum & Chilli | 40°C+ | Very heat tolerant — keeps flowering and fruiting through extreme heat | Water consistently; minimal shade needed |
| Eggplant | 40°C+ | One of the most heat-tolerant vegetables available | Keep watered — almost no other protection needed |
| Zucchini & Pumpkin | 38°C | Wilts in extreme heat but usually recovers overnight | Mulch heavily, water in the morning |
| Corn | 38°C | Kernel set can be affected above 35°C during pollination | Water extra during flowering — critical window |
| Tomatoes (cherry) | 36°C | Flower drop begins above 35°C — fruit won't set | Shade cloth from Dec–Feb, cherry varieties over large-fruited |
| Tomatoes (large) | 32°C | Flower drop above 30°C; production stops in extreme heat | 30–50% shade cloth essential; deep water every 2 days |
| Cucumber | 35°C | Bitter fruit, reduced setting above 35°C | Afternoon shade in January; keep soil consistently moist |
| Basil | 38°C | Bolts to flower in heat — pinch tips regularly | Pinch constantly; water frequently |
| Lettuce | 26°C | Bolts to flower, turns bitter, becomes inedible rapidly | Autumn and winter only — never attempt in summer |
| Broccoli | 24°C | Bolts to flower before heads form; ruined crop | March–April planting only; never attempt in spring |
Flower Seedlings
Colour in the Garden
Seasonal flower seedlings to brighten up gardens, pots, and window boxes. Stock changes with the season — come in and see what's flowering now.
Best Bets for Beginners
Easiest Crops to Start
in Swan Hill
Capsicum & Chilli
If you only grow one summer crop, make it capsicum or chilli. They genuinely thrive in Swan Hill's summer, need less babying than tomatoes, and reward you with an enormous harvest over several months.
Zucchini
Hard to kill, fast to produce, and prolific once going. Plant one or two in October and you'll have more zucchini than you know what to do with by January. One of the most forgiving crops in a Mallee garden.
Broccoli (Autumn)
Plant broccoli in March and it almost looks after itself through the cool months. Almost no pest pressure, no bolting, and a satisfying big harvest in June and July. The ideal "set and forget" winter crop.
Open 7 Days
Not sure what to plant
right now?
Come in and ask. We always know what's in season, what's holding up well in the current conditions, and what to avoid. Growing food in Swan Hill has its quirks — and we're happy to share what we know.