Fertilizing Radish Plants
Just before you plant your radishes, you should work some all-purpose fertilizer into the soil. Apply about one pound (0.5 kg.) of 16-20-0 or 10-10-10 fertilizer per 100 square feet (9 sq. m.) of soil. Ideally, you should be planting your seeds in 10 foot (3 m.) long rows spaced 1 foot (31 cm.) apart, but you can scale down for much smaller spaces. Mix the radish plant fertilizer into the top 2 to 4 inches (5-10 cm.) of your soil, then plant your radish seeds ½ to 1 inch (1-2.5 cm.) deep and water them thoroughly. If you don’t want to use commercial fertilizer, the same radish plant food effect can be achieved by working 10 pounds (4.5 kg.) of compost or manure into the soil instead. So, is one time enough when fertilizing radish plants? After you’ve applied your initial all-purpose fertilizer, your radish fertilizer requirements are basically met. If you want to provide a little extra radish plant food to kick your growth into high gear, however, try adding about ¼ cup (85 g.) of nitrogen-rich fertilizer per 10 feet (3 m.) of row to promote fast foliage growth, especially if you plan on consuming the greens.
