Grand Slam
ActiveBrassica oleracea L. (White Cabbage Group) · White cabbage
Yusuke KATO, JP
Brassica oleracea L. (White Cabbage Group) White cabbage · Vegetables · bred by Kees Reinink
also searched as: сонсма
10 August 2026
The variety belongs to the group of ultra-early hybrids with a maturity period of 40–45 to 55–60 days after transplanting. The plant is intended for cultivation in open field and protected cultivation. The crop is characterized by plasticity and a developed root system, while the rosette itself does not possess high growth vigor.
The heads have a conical shape, their weight varies from 0.8 to 2.1 kg with average density. The wrapper leaves are green, and the inner ones are light green. The hybrid demonstrates uniformity of fruit, however it requires protection from pests.
3 jurisdictions
Green indicates countries where the variety is listed in the national catalogue and its seeds are authorized for sale. Expired registrations are marked separately: the variety was previously admitted, but sale is no longer permitted.
Variety registered as early as 2 jurisdictions, data for which we do not publish: their registry licenses have not yet been verified. This section will be available upon verification.
The variety is listed in the national registry — its seeds are authorized for sale in this country.
№ 255607
№ Sonsma
№ KOW 00143
№ 58363
№ 15096010
Records are sourced from official registry publications. Data sources and legal status
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Same species
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L. DÆHNFELDT A/S
Nearby in the species list Solidon, Solidon I, Solitor, Sonar, Sonata, Sonic, Sonja, Sonja F1, Sonnet, Sonor, SONTANA, Soprano, Sougestu, Sougetsu, Sougetsu No. 2, Sovereign, Spark, Spartan, Speedon, Sphinx