Champion Radish Seeds

Sow Champion Radish seeds directly outdoors — no indoor starting, radishes develop a taproot early and transplanting sets them back hard. Plant ¼–½ inch deep in rows 12 inches apart, in spring or fall, once soil temperatures are below 80°F. Germination is one of the faster ones you will see in the vegetable garden: 3 to 10 days under decent conditions. If you want a steady supply rather than one large harvest all at once, sow a short row every 10–14 days through the cool season. In warm climates, get seeds in at least 4 weeks before temperatures start climbing — heat during root development is the main thing that turns a good radish harvest into a disappointing one.

Champion Radish needs full sun, at least 6 hours daily. Soil quality matters more with radishes than people expect — loose, fertile, well-drained ground produces the smooth, round roots this variety is known for, while compacted or stony soil produces forked, cracked, or stunted ones. Work the bed to at least 6 inches deep before sowing and pull out any stones or hard clumps. Water consistently; the soil should stay evenly moist throughout the growing period. Dry spells followed by sudden heavy watering cause roots to split, which is one of the more frustrating things to find at harvest when the plants looked fine from above.

Thin seedlings to 2–3 inches apart once they reach about an inch tall. Crowded radishes put their energy into leaf growth rather than roots, and no amount of good soil or watering fixes that once the plants are established too close together. Champion is slower to turn pithy than most radish varieties, but that does not mean you can leave roots in the ground indefinitely — beyond maturity they still go hollow and bitter, just more slowly. Most roots are ready 25–30 days from sowing. Pull one and cut it open before harvesting the rest; if the flesh is firm and white all the way through, the batch is ready. In hot weather check every day or two, because the gap between perfectly ready and past it closes fast.