For gardeners, the difference between a forgettable green bed and a show-stopping autumn display often comes down to one decision: choosing the right purple ornamental kale. While standard green kale blends into the background, the deep burgundy, plum, and dusky violet frills of a true ornamental variety command attention from the first frost until the heaviest snow.
I’m Mohammad Maruf — the founder and writer behind Gardening Beyond. For this guide, I’ve combed through technical spec sheets, sorted hundreds of customer reports, and analyzed the germination rates, color stability, and cold-hardiness data of the most promising purple ornamental kale options available online so you don’t have to.
Whether you are designing a container arrangement, a border edge, or a seasonal cut-flower bed, the right purple ornamental kale delivers vivid, lasting color that holds through winter chill. This review of the best purple ornamental kale is built on concrete specs and real field feedback to help you pick the perfect variety for your garden.
How To Choose The Best Purple Ornamental Kale
Purple ornamental kale is valued for its vivid foliage, cold tolerance, and ability to hold color through winter. But not all varieties are equal. Focus on these factors to ensure your flower bed or container gets the lasting impact you expect.
Foliage Color & Frost Response
The hallmark of a true ornamental is its deep purple, maroon, or plum hue. Many varieties develop their richest tones only after exposure to light frost. Check customer reviews for mentions of color depth after cold weather. Varieties bred for leaf color intensity rather than tenderness will stay vibrant longer into the season.
Plant Size & Growth Habit
Ornamental kale can range from compact mounds under 12 inches tall to plants reaching 24 inches with a spread of 18 inches or more. Know your planting space. For borders and edging, a smaller, clumping habit works best. For dramatic centerpieces in large containers, look for varieties that reach 24 inches or more.
Seed vs. Live Plant
Seeds offer the widest selection of colors and types and are more cost-effective for mass planting, but require proper timing and germination conditions. Live plants (potted starts) give immediate impact with less guesswork, but are often limited to a single color or variety. Decide based on your patience and planting window.
Cold Hardiness & Season
Ornamental kale is a cool-season performer. It thrives in fall and winter and can tolerate light freezes. Check the USDA zone rating if buying live plants. Seeds should be started in mid-to-late summer for autumn color. Avoid any variety that bolts (goes to seed) quickly in warm weather if you want a long display.
Quick Comparison
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| Model | Category | Best For | Key Spec | Amazon |
|---|---|---|---|---|
| Black Magic Dinosaur Kale Seeds | Seed | Large dramatic dark leaves | 2 ft long leaves | Amazon |
| Live Heuchera (Coral Bells) | Live Plant | Shade garden purple foliage | 24 in mature height | Amazon |
| Perennial Farm Liriope Variegated | Live Plant | Borders & edging with purple spikes | 12 in clumping height | Amazon |
| Kale Trio Sprouting & Microgreen Mix | Seed Mix | Microgreens & sprouting | 1 lb resealable bag | Amazon |
| Nature Jim’s Organic Salad Mix | Seed Mix | Quick microgreens & sprouts | 1 lb organic blend | Amazon |
In‑Depth Reviews
1. Black Magic Dinosaur Kale Seeds
This is the closest you will get to a true ornamental purple kale in seed form with a dramatic twist. The leaves grow almost 2 feet long, and the plant matures from grey-green to a deep, almost black forest-green that reads as a dark, brooding purple in the garden. It is an heirloom variety, so you get genetic consistency and the ability to save seeds for next season.
The sweet, rich flavor is a bonus if you decide to harvest, but the main event here is the sheer size and color transformation. Customers report germination within a week when soil is warm, and the plants handle regular watering without issue. The 500-count pack gives you enough for multiple succession plantings or a large bed.
Color depth improves after a light frost, a hallmark of ornamental kale. While it is technically a culinary variety, its unusual leaf structure and dark pigmentation make it a fantastic conversation piece in any ornamental border. The main limitation is that it prefers full sun for the deepest color, and some growers noted the price per seed is higher than generic mixes.
What works
- Exceptional 2-foot leaf length adds dramatic texture
- Sweet flavor improves after frost
- Heirloom seeds with high germination rate
What doesn’t
- Price per seed is higher than standard kale
- Requires consistent warmth to germinate
2. Live Heuchera (Coral Bells) – Shades of Purple
For those who want instant gratification and guaranteed purple foliage, this live Heuchera (Coral Bells) delivers. It arrives as a 10-inch tall plant in a 2-quart pot, already showing deep purple and maroon leaves. You plant it and get color immediately, without the weeks of waiting for seed germination.
Heuchera is a shade perennial, meaning it excels exactly where ornamental kale often struggles: low-light areas. It reaches 24 inches tall with a 12-18 inch spread, forming a tidy mound. The color intensity actually deepens with more shade, making it perfect for woodland gardens or north-facing beds. Customers consistently praise the healthy condition upon arrival.
The downside is that it is not a true kale, so if you specifically want the frilly, cabbage-like rosette of an ornamental kale, this is a different look. A few customers received plants that did not match the vivid purple pictured, reporting darker green tones on top. It is also a perennial, so it returns each year, unlike annual ornamental kale.
What works
- Immediate color from a live, established plant
- Thrives and deepens in shade
- Perennial habit for year-after-year return
What doesn’t
- Not a true ornamental kale rosette
- Foliage color can appear more green than pictured
3. Perennial Farm Liriope Variegated
If you want purple tones combined with a tough, low-maintenance groundcover, this Liriope delivers. It produces lilac-purple flower spikes in late summer above variegated green and cream foliage. The contrast is striking and the color lasts for weeks, bringing purple into your garden without needing a traditional kale.
It is hardy in USDA Zones 4-10, so it survives harsh winters and returns each spring. The compact clumping habit reaches 12 inches tall, making it ideal for edging walkways or filling borders. Customers consistently note the healthy condition upon arrival and sturdy packaging. It tolerates heat, humidity, and poor soil with minimal care.
This is not a true ornamental kale, so the purple comes from flowers, not foliage. The leaves are grass-like, not frilly. Also, it cannot be shipped to several western states due to USDA restrictions. For a purple accent that lives for years and needs almost no water once established, this is a solid choice.
What works
- Extremely hardy across a wide zone range
- Purple flower spikes add seasonal color
- Low maintenance and drought tolerant
What doesn’t
- Grass-like foliage, not a true kale rosette
- Restricted shipping to several states
4. Kale Trio Sprouting & Microgreen Mix
This mix combines Red Russian, Premier, and Vates Blue Curled Scotch kale seeds in one 1-pound resealable bag. The Red Russian variety, in particular, offers striking purple stems and red-tinged leaves that look beautiful on a microgreen tray or in a garden bed. The heirloom genetics ensure consistent germination and flavor.
Customers report exceptional germination rates, with many noting the seeds sprout reliably and quickly. It works perfectly for microgreens (harvest in 6-10 days) but can also be planted outdoors for full-sized plants. The resealable bag keeps seeds fresh for multiple planting sessions. The flavor is described as mild and delicious.
The bag is clearly marketed for sprouting and microgreens, so if you want a classic ornamental kale rosette, this mix will give you a more varied, less uniform look. A few customers received a bag with a hole, causing some spillage. For the sheer volume and versatility, it offers excellent value.
What works
- Large 1-pound bag for multiple plantings
- Red Russian provides purple-tinged leaves
- Works for both microgreens and full plants
What doesn’t
- Not a uniform ornamental; mixed varieties
- Packaging can be prone to damage during shipping
5. Nature Jim’s Sprouts Organic Salad Mix
This organic sprouting mix includes broccoli, alfalfa, radish, and clover seeds. While it does not contain kale, the radish seeds produce purple-tinged stems that add a similar ornamental touch to microgreen trays. It is designed for speed—sprouts are ready in just 5 days.
The organic certification and non-GMO labeling provide peace of mind. Customers report consistent, fast germination with a mild nutty flavor. The 1-pound bag is cost-effective for continuous sprouting. It is ideal for indoor gardening year-round, requiring only a jar and regular rinsing.
It is not a substitute for true ornamental kale. The purple color is limited to radish stems, and the overall look is more of a mixed salad than a uniform display. Also, the sprouts are best consumed quickly as they do not store long in the fridge. If you want quick, nutrient-dense greens with some purple accents, this is a solid entry-level option.
What works
- Organic and non-GMO certified
- Ready to harvest in just 5 days
- Excellent germination rate reported
What doesn’t
- No true kale; purple from radish only
- Short fridge shelf life after sprouting
Hardware & Specs Guide
Germination Rate & Timing
Look for reported germination rates above 80%. Most high-quality kale seeds should sprout within 5-10 days under optimal conditions (soil temperature at least 65°F). Lower rates indicate older or lower-quality seed stock. Heirloom and organic seeds often have excellent viability if stored properly.
Mature Plant Dimensions
Ornamental kale varies dramatically: compact varieties stay under 12 inches tall, while large types like Dinosaur Kale can reach 24 inches with leaves up to 2 feet long. Know your planting space. For containers, choose compact growers. For borders, allow at least 12-18 inches of spread for air circulation.
FAQ
Does purple ornamental kale need full sun to maintain its color?
Can I eat purple ornamental kale?
How long does purple ornamental kale last in the garden?
Final Thoughts: The Verdict
For most gardeners seeking the true ornamental kale experience, the best purple ornamental kale winner is the Black Magic Dinosaur Kale Seeds because it combines dramatic 2-foot leaves with deep, almost black-purple color that improves after frost. If you want immediate color without seed starting, grab the Live Heuchera (Coral Bells). And for versatile value that works for both microgreens and full garden plants, nothing beats the Kale Trio Sprouting & Microgreen Mix.