Spinach is the rare crop on this site whose official sowing calendar doesn't shift by zone — the same September-to-February window applies here as everywhere else in NZ. What does shift is which half of the twelve cultivars sourced for this zone actually earns its place: six are true spinach, and the other six are entirely different plants sold under the spinach name, several of them genuinely tropical. Cool/mountain's cooler summers and longer frost season change the calculus on both groups.
True Spinach
| Variety | Supplier | Best season | Notable for |
|---|---|---|---|
| Winter Upright F1 | Kings Seeds NZ | Winter | Bred with good vigour for winter growing, resistant to some downy mildew races, strong anthracnose tolerance |
| Winter Giant | Kings Seeds NZ | Autumn & winter | Leaves thicken as the temperature drops |
| Santana F1 | Kings Seeds NZ | Year-round | Slow to bolt, resistant to some strains of downy mildew |
| Bloomsdale | Kings Seeds NZ | Spring & autumn | Good vigour in the cool, tolerates some warmth |
| Japanese (AKA Lands End) | Koanga Institute | Spring & autumn | Rare NZ heritage line, taller with larger, less crinkled leaves |
| Summer Solstice F1 | Kings Seeds NZ | Summer | Slow-growing European type bred specifically for warm months |
Spinach in Name Only
| Variety | Supplier | What it actually is | Notable for |
|---|---|---|---|
| Beet Perpetual | Kings Seeds NZ | A beet relative, described as offering a "spinach-like leaf" | Cold-hardy, rarely runs to seed before its second year |
| New Zealand | Kings Seeds NZ | A different, unrelated plant sold as "NZ spinach" | Heat-tolerant, trailing habit |
| Preservation Pack (NZ Spinach) | Koanga Institute | Same NZ spinach plant as above | Perennial grown as a tender annual |
| Strawberry | Kings Seeds NZ | A 400-year-old heirloom grown for its berries | Edible red berries alongside spinach-like leaves |
| Malabar | Kings Seeds NZ | A tropical climbing vine | Heat-loving, highly frost-sensitive, needs a climbing support |
| Water Bamboo Leaf | Kings Seeds NZ | Water spinach / kangkong, grown in water | Tropical, grows in moist soil or shallow water |
Cold-Weather Types Do More Work Here
Flip the usual order and put Winter Upright F1 and Winter Giant first for this zone — cool/mountain's frost season runs longer than a milder garden's, and these are the two true spinach cultivars actually bred around cold. Winter Upright F1 is the stronger of the pair on paper: good vigour specifically through winter, resistance to some downy mildew races, and strong field tolerance to anthracnose on top of that. Winter Giant's leaves simply thicken as temperatures fall, sown in autumn to catch that effect. Bloomsdale and Koanga's Japanese (AKA Lands End), a rare Southland heritage line through the Harrington Collection, both sit in the shoulder seasons rather than deep cold or full heat. Santana F1 stays the most flexible pick regardless of zone — Kings Seeds NZ rates it slow to bolt and suitable for year-round growing, backed by named resistance data against some downy mildew strains. If bolting shows up despite that, see Why Is My Spinach Bolting Straight Away in NZ Cool/Mountain? for the fuller picture.
Less Pressure to Reach for the Substitutes
Summer Solstice F1 is still true spinach's one summer specialist — a slower-growing European type Kings Seeds NZ describes as "perfect for growing through the warmer summer months" — but a cooler-summer zone like this one puts less heat stress on true spinach generally, so leaning on it (or the heat-loving substitutes below) matters less here than in a warmer garden. Two of those substitutes are worth a specific caution in this zone: Malabar, a genuine tropical vine marked "highly sensitive to frost," and Water Bamboo Leaf, warm-season water spinach that needs consistently warm conditions to establish — both have less time to work with outdoors here, since this zone's frost season closes in around them from both ends. New Zealand and Koanga's Preservation Pack are the same heat-tolerant NZ spinach plant under different names, and being genuinely heat-loving rather than tropical, they handle this zone's shorter warm stretch more comfortably than Malabar or Water Bamboo Leaf do. Beet Perpetual runs the opposite direction entirely — cold-hardy, not heat-driven, and its own listing calls it a "spinach-like leaf" on what's actually a beet relative; see Growing Silverbeet Year-Round in NZ if that's the crop you're really after. Strawberry stays a novelty pick for its edible berries rather than a heat or cold strategy either way.
Planting for This Zone
The sowing calendar itself is unchanged from anywhere else in NZ: September to February, harvesting November through April, roughly 50-70 days from sowing to harvest, with succession sowing recommended over one large flush. What's worth adjusting for this zone is the mix rather than the dates — weight the true-spinach side toward Winter Upright F1 and Winter Giant rather than the summer specialists, and if you do want one of the tropical substitutes, sow it well within the frost-free stretch rather than at either edge of the window, since this zone gives it less margin either side than a milder garden would.
Ready to plan the rest of your garden? Check the NZ Cool/Mountain Planting Calendar →.