Rettmann is a long, slim Japanese radish (Minowase type) for the entire outdoor growing season, especially for early cropping. Around 30-40 cm in length, smooth-skinned and snow white. Pleasant very mild taste.Long, slim Japanese radish (Minowase type) for the entire outdoor season. The snow-white roots grow to about 30-40 cm in length and are smooth-skinned. Rettmann has a very mild taste, with juicy and crisp flesh.
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Characteristics for Rettmann
Suitable for growing: open groundBotanical name: Raphanus sativus var. niger
Cultivation for Winter Radish
Amount of seed needed: for bunching: 30-60 g/a; ca. 12 seeds per running metre
single roots: 30-60 g/a; 5-7 seeds per running metre
Planting distance: for bunching ca. 25 x 8 cm
single roots ca. 25 x 20 cm
Note: sow more thickly and thin out to the required spacing
Optimal amount of plants: for bunching ca. 50 plants/m²
single roots ca. 20 plants/m²
Sowing depth: 1-2 cm
bred by
Heinz-Peter Christiansen
Current breeding location: Silberstedt, Schleswig-Holstein
Bioorganic bred varieties from Heinz-Peter Christiansen:
The Demeter farm De Beersche Hoeve is a propagation and breeding farm located at Gut Baest in the south of the Netherlands. It is a former monastery farm that has been in operation for 800 years.
Free shippingSeeds within Germany until 13 April 2026*
Organic100 % GMO-free
FairCollaborative network with breeding and propagation
DynamicDiversity of 100 % open-pollinated varieties
Sow variety, save shipping costs! To celebrate the start of the outdoor season, we are offering free delivery on seeds, books, and tools within Germany until 13 April 2026.
Save shipping costs! We are offering free delivery on seeds, books, and tools within Germany until 13 April 2026.