Portuguese Kale is a hardy heirloom brassica that may well be the toughest kale you can grow. This annual cultivar matures in 85 days and thrives in cool weather, developing tender, rounded, succulent leaves that actually improve in flavor after frost. It tolerates partial shade and cold snaps with remarkable resilience, making it especially valuable for gardeners in regions with unpredictable winters or short growing seasons.
Photo © True Leaf Market
Growing Conditions
Sunlight
Partial Shade
Water
Moderate
Soil
Well-drained, Fertile Loam With Consistent Moisture
Preferred Temp60-75°F
Growth Stats
—
Height
—
Width
18 in
Spacing
80–89
Days to Harvest
PeriodPerennial
TypeForb/herb
Plant Profile
Sunlight
Partial Shade
Water
Moderate
Zones
?-?
Size
?in H x ?in W
Growth
Perennial
Care
High
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Highlights
Portuguese Kale's exceptional cold hardiness sets it apart; the leaves become sweeter and more tender after frost kisses them, a trait that makes late-season harvests genuinely delicious rather than merely edible. It grows steadily even through light warm spells, never sulking or bolting prematurely, and the rounded leaf structure catches light beautifully in the garden. With approximately 8,000 seeds per ounce, each packet delivers remarkable value for the home gardener.
Common Uses
Portuguese Kale is grown as a cool-season green, harvested for cooking or fresh use. The tender, rounded leaves make it well-suited to braising, sautéing, or adding to soups where its mild sweetness and succulent texture shine. Because frost improves its flavor, it's particularly valuable for fall and winter harvests when other greens have faded.
Growing Timeline
First Bloom
Not Applicable
First Harvest
Mid-summer
Last Harvest
Late Fall
Care Instructions
Harvesting
Harvest Portuguese Kale at 85 days from sowing. The tender, rounded leaves are best picked after frost, when their flavor has sweetened and deepened. You can harvest individual outer leaves as needed, or cut entire plants. The succulent texture of the leaves indicates peak readiness, and waiting for a light frost before the main harvest will reward you with noticeably better flavor.
Growing Calendar
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Companion Planting
Ecology & Traits
Edible
Scientific Classification
Brassica oleracea L.
Family
Brassicaceae
Genus
Brassica
Duration
Perennial
Native Status
L48 (I)PR (I)CAN (W)GL (W)
History & Origin
“This heirloom variety carries the traditions of Portuguese agriculture into modern gardens. Passed down through generations for its exceptional cold tolerance and flavor development, Portuguese Kale represents the kind of practical, no-fuss crop that sustained families through harsh winters. Its preservation as a named cultivar speaks to its reputation as perhaps the hardiest of all the cabbage family members, a distinction that earned it a permanent place in seed catalogs and on gardeners' lists.”