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DeliDahlia® Hapet® Black Jack

Reminiscent of asparagus and kohlrabi

DeliDahlia® Hapet® Black Jack


Article number: 2191015


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£5.40 *

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Product information "DeliDahlia® Hapet® Black Jack"

It is interesting to note that with Black Jack a red-leaved dahlia has found its way into the groups of Delidahlias®. Not only does it have a different leaf colour, but also a different coloured tuber (red, but only externally). The Delidahlia® Black Jack tastes similar to the other varieties and is reminiscent of asparagus and kohlrabi. The fine, almost melting texture was notable in the many tastings. What is important in this variety is that it is well peeled. The Delidahlia® Black Jack blooms late, but develops the tubers at the same time and in the same intensity as the other varieties. In order to enjoy the almost black flowers before the tubers, Black Jack must be planted as early as possible.

Dahlia group: Giant dahlias
Flower type: Semi-cactus dahlia
Height: 140 cm
Tubers: Oblong-bulbous, average yield, red skin colour
Taste/texture: Very fine on the palate, almost melting, fibres are sometimes only on the outside; reminiscent of asparagus and kohlrabi

About DehliDahlien

The Aztecs used dahlia tubers as food. After more than 500 years, we have attempted to renew this tradition and have selected the best, edible dahlias.

For two years now, we have systematically grown K&K dahlias at our two locations in Bad Zwischenahn (Germany) and in Buchs (Switzerland); we carefully dug the tubers out in autumn, we prepared them, then cooked and ate them. Actually, the verb “taste” is more reasonable: we cooked each of the dahlias in a similar way in a pressure cooker (for 10-15 minutes), we served them without spices and without side dishes in order to really perceive the taste itself; and we tested each of the varieties with several test persons (once with the entire staff) in order to obtain comparable and stable results and select the best-tasting dahlia delicacies. The feedback from our customers also helped, whom we had sent free packages of test dahlias through a newsletter campaign in the spring of 2014. This immense work, which is comparable to wine tastings, will continue in the coming years and lead to further Delidahlias®.

It should not be forgotten that the dahlias that had been selected at least 500 years ago were not selected because of their tuber quality or their taste, but only because of their wonderful and opulent flowers. It would have been somewhat daring to catch up with all that in two years; however, we were able to select very interesting and good tasting dahlias thanks to our broad and extensive tests.

Now you might ask yourself: What do dahlias actually taste like? The first answer: very different, but often very intense! At Lubera, we have tested many root vegetables and root crops in the last few years, but neither the sweet potatoes nor the Oca or other South American root crops had such an intense and different taste of its own. Many varieties obviously have a high content of essential oils that can really rise to the nose and are almost too intense. An exclusion criterion was also when the cooked tubers were too fibrous. This is partly a variety characteristic (and such varieties were not selected), and on the other hand, the fibrousness occurs more in old tubers, which is why we recommend using old tubers only for hash browns and the like; when preparing the tubers as a vegetable, only the younger, outer tubers should be used.

The Delidahlias® found in this selection process taste partially fine and discreetly like asparagus, black salsify and nuts; some varieties also have a more vegetable flavour, in which one is reminded of turnip greens, parsley, celery and even fennel.

But you will not exactly know until you've tried the Delidahlias® yourself. First enjoy the explosive growth of the asexually propagated dahlia young plants in May and June, then throughout the summer the imposing and opulent flowers... and when all the splendour comes to an end, then a whole new story starts again with the Delidahlias®: dig them out, prepare them, cook them, try them and enjoy...and continue to tell the story of the Delidahlias®.

PS: Three of the presented Delidahlias® can also be grown well in pots, thanks to their compact growth. Due to the rapid warming, the loose substrate and good nutrients, pot dahlias develop many and fine tubers. These can be cleared even easier and gentler than the dahlias planted in the ground (simply dump and shake).


Pinching dahlia young plants and protecting them from slugs After planting (and until the dahlias are approx. 50 cm high), the young plants must be protected against voracious slugs. It may help to place a large, imposing pot over the plant every night. Note: Take it off during the day again! ;-). In order to produce sufficient basal shoots and to encourage branching, it is also possible to pinch the Delidahlias® to about 15-20 cm in height.
  • Flowering Period June, July, August, September, October, November
  • Ripeness/Harvest Period November
  • Final height 120cm to 140cm
  • Final width 40cm to 60cm
  • Available May, June, July
  • Use beds/borders, outdoors, for containers, for cutting and drying, as a structural plant, South- and West-facing walls, for group plantings, as a specimen plant
  • Soil dry, moderately heavy, light, slightly alkaline, neutral, slightly acidic
  • Location full sun
  • Flower Colour mixed/striped, black, red
  • Leaf Colour mixed/striped, black, green
  • Lubera Easy Tip Based on our experience in the variety tests but also in customer service, we have awarded this plant with the title “Lubera Easy Tip”. With this designation, we emphasise only those plants that according to our experience work (almost) everywhere; they are easy to grow and bear fruits or produce flowers quickly and without problems. These are plants that can be enjoyed immediately and without effort once planted.
  • Lubera Selection This plant is an exclusive launch from Lubera. Lubera searches worldwide for new varieties and species that will make gardening more exciting and easier! We encounter new products again and again that we can exclusively bring to the market after intensive testing.

Customer comments "DeliDahlia® Hapet® Black Jack"

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Take advantage of this form for your questions(s) about the product "DeliDahlia® Hapet® Black Jack". Your question(s) and also the answers (from the Lubera® team and other garden friends) will be published here.

Dec 17, 2017

tubers (Karin Holloway)

Our variety of edible tubers bloomed beautifully but I've been remiss in digging them up and out - it's mid-December now. Should I remove all of them, even if they're now too fibrous to eat as a cooked veg? Store them for spring planting? Thank you!

Dec 18, 2017

Dahlia tubers (Sonja Dreher)

I would dig them up and just try. Cut a little tuber in halvs and then you will see, if they are dry.
If you are in doubt, just store them for next year.

kind regards
your Lubera Team

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