Japanese Turnip Seeds (Shogoin) OPEN POLLINATED, eafy tops are ribbed and tender Japanese Turnip Seeds (Shogoin) OPEN POLLINATED, eafy tops are ribbed and tender. Qty: 1g (350 Seed) Shogoin turnip is one of the oldest traditional. It produces a large, globe turnip that can reach 6-8" in diameter but is most tender when harvested at 4". It is grown for both its delicious mild green tops and fine grained roots. The broad leafy greens grow to 20" in height. Flesh is firm and crispy. Cool season annual Maturity: Approx. 50 days Planting season: Late spring or late summer/early fall Brassica rapa var rapifera This Asian vegetable is also called... China: mo ching, manjing, wu jing Japan: kabu, kabura Work garden soil until loose. Amend with compost, if necessary, to achieve moderately fertile conditions in a well-drained area that receives full sun to partial shade, with a pH of between 5.5 and 6.8. Make shallow trenches with your finger about 1/2-inch deep. Space the trenches 12 to 24 inches apart. Sow purple top turnip seeds about 1 inch apart in the trenches, four to six weeks before the last frost for harvest in late spring, covering the seeds lightly with soil. Purple top and other turnip varieties grow best in daytime temperatures of 60 to 65 degrees Fahrenheit.