Turnips are easy to grow if sown in the proper season. They mature in two months and may be planted either in the spring, late summer or fall for roots or greens. The spring crop is planted for early summer use. The fall crop, which is usually larger and of higher quality, is often stored for winter use. For summer use, turnips should be planted as early in the spring as possible.
For fall harvest, plant rutabagas about 100 days before the first frost and plant turnips about 3 to 4 weeks later. Plant seeds 1/2 inch deep (3 to 20 seeds per foot of row). Allow 12 to 24 inches between rows. Water if necessary to germinate the seed and establish the seedlings (especially for summer sowing). Thin rutabaga seedlings to six inches apart when they are two inches tall.
Thin turnip seedlings to 2 to 4 inches apart when they are four inches tall. The removed plants are large enough to use as greens. If you have planted turnips for greens, harvest the tops as needed when they are 4 to 6 inches tall. If the growing points are not removed, tops continue to regrow. Turnips and rutabagas store well in refrigerator.
Spring turnips should be pulled or cut when the roots or tops reach usable size. Harvest fall roots starting in early autumn or as needed. Turnips and rutabagas are of best quality (mild and tender) when they are of medium size (turnips should be 2 to 3 inches in diameter and rutabagas 3 to 5 inches in diameter)
(Approximately 14,000 - 16,000 seeds per oz.)