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Organic Dahlia 'Mexican Star'

Organic Dahlia 'Mexican Star'

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Organic scented dahlia

The Dahlia 'Mexican Star' also known as 'Mexican Black' is a chocolate brown open heart dahlia, which has been crossed with Chocolate Cosmos, giving the flowers a chocolate scent. She grows to about 70 centimeters high with 7 centimeter wide flowers. The heart is open to insects during the entire flowering period and it is also very suitable as a cut flower.

A dahlia blooms for a very long time, up to 100 days a year, because countless flowers come back when you remove the spent flowers. A veritable sea of ​​flowers, late in the season when most plants have already finished blooming.

How, where and when do I plant organic dahlia tubers?

Favoring indoors

A Dahlia 'Mexican Star' is not winter hardy. This allows the tubers to be grown indoors from March onwards. This gives a head start in growth and the dahlias bloom earlier. The plants can be put outside after the ice saints (May 15), or earlier if the weather is good, but be careful of night frost, then they will have to go back inside at night.

Outside in the garden

If you choose to wait until after frost before planting the dahlia tubers, it is best to do so until May 15. From then on, the tubers can be planted in the ground without any risk of frost and they will bloom approximately 60-90 days later.

Plant the dahlia tuber with its old flower stem from last year upwards, just 2 to 3 centimeters below the ground and keep a distance of half a meter from tuber to tuber.

The planting time is until June.


A dahlia prefers a sunny position in a nutrient-rich, water-permeable, preferably calcareous, sandy soil. The Dahlia 'Mexican Star' grows medium high with small flowers, so it does not need to be supported or placed in a sheltered spot.

For pot planting, it is best to use a pot that is at least 40 centimeters wide, so that it does not dry out too quickly in the summer.


Always keep the soil of the Dahlia 'Mexican Star' moist. Too dry soil can cause problems with growth and flowering.
During flowering, the spent flowers are removed for new blooms. The dahlia blooms until the first night frost. Cut the plant down to the ground. Protect the tubers planted in the open ground with leaves against light frost in winter. In severe frost they should be stored frost-free in a dry place. The advantage of digging out is that the tuber can be divided every year.

Feed the plant several times a year for optimal results. The dahlia is a fast-growing plant that can use a lot of nutrition.
We recommend Bio Kultura for organic potting soil, plant food and other soil improvers!


The tubers continue to grow well in the autumn. Do not remove the tubers from the ground too early for propagation. Just before the first frost is the best time. The tubers can be split immediately, but this can also be done in the spring. The advantage of splitting in the spring is that small growth points can already be seen in the spring. This makes it easy to recognize where the tuber can best be split.


Everything about the Dahlia 'Mexican Star' is edible. The tuber tastes carroty and the flower can be used to garnish a salad or in a carafe with water, for decoration and to flavor the water.


The dahlia originates from Mexico and has been found in European gardens since the year 1615. Previously grown as a tuber for eating, but after seeing how a beautiful ornamental plant it can be, a plant with one of the most cultivars in the world.

Our organic dahlia tubers are grown in North Holland by two different organic growers.

Organic Dahlia 'Mexican Star' - Skal NL-BIO-01 certified: 109459

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Flowering time: July - October
Planting time:
From May (or from March to favour)
Planting depth:
2 cm underground
Planting distance: 50 cm apart
70 cm high
Flower diameter:
7cm wide
Partial shade, sun
Soil PH: Loam, sandy soil - slightly acidic to neutral
Winter hardiness:
Not winter hardy
Propagation: Good
Origin: Mexico
Family: Asteraceae (composite family) x Cosmos
Chocolate brown
Group: Open heart
Bee-friendly: Yes
Fragrant: Yes (chocolate)
Bulb size: 1st size


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