This tetraploid variety produces smallish, almost black skin and flesh (sometimes with a bit of whitish marbling) tubers that look pretty amazing to people who are used to supermarket varieties.

  • Plant: Upright.
  • Ploidy: Tetraploid
  • Flowers: mauve
  • Tubers: elongated. Medium eyes. Dark purple/black skin and flesh with a little white marbling
  • Best for: boiling and salads.
  • Production: Each plant should produce about 10 eating size tubers (5-10cm across) and a few small ones. About 1 kg per plant.
  • Other:   
  • Planting:  Planting  1st September gives you a harvest 1st Dec (98 days). Chit and replant immediately for a harvest in March/April, then another crop for July harvest if you have few frosts. Place last tubers for replanting next spring in a dark, dry place, or, place in a cool, dry full sun spot. Either way they will hold until September planting even if they produce small sprouts in storage.
  • Commercial use?  No, they do not produce well enough
  • Fertility: Grim Reaper, being a diploid is not self fertile but if planted near other diploids will set many seed berries.

Growing timetable

  • Planting to sprouting – 12-14 days (after storing tubers for 4 weeks)
  • Sprouting to flowering – 5 weeks
  • Planting to harvest –  95 days (just over 3 months)

Storage timetable – time from harvest to starting to sprout

  • In dark at room temp: 70 days
  • In light at room temp: 22 days
  • Replanted directly after harvest: 28 days