German Giant is a beloved heirloom radish with roots in European kitchen garden tradition, where large, mild radishes were prized for their versatility at the table. True to its name, this variety produces impressively large roots — often reaching the size of a baseball or larger — while maintaining a surprisingly mild, crisp flavor. It has been a staple of heirloom seed collections for generations and remains one of the most popular large radish varieties among home gardeners today.
Plant Profile
-
Days to Maturity: 29–35 days
-
Root Size: 2–4 inches in diameter (baseball-sized or larger)
-
Plant Size: Upright leafy tops, 10–14 inches tall
Flavor Profile
German Giant delivers a mild, juicy crunch with just a gentle peppery bite — far milder than its impressive size might suggest. The flesh is pure white, dense, and crisp, holding up well to slicing, dipping, and cooking. Its approachable flavor makes it a crowd-pleaser even for those who typically shy away from radishes.
Growth Type & Harvest Yields
This is a large, round to slightly oblong radish with deep rose-red skin and bright white flesh. Despite its size, it matures quickly and holds well in the ground without becoming pithy as fast as smaller varieties. Expect one large, impressive root per plant.
Disease Resistance
German Giant shows good tolerance to cracking and pithiness, especially when kept well-watered. It holds in the ground longer than most radishes without becoming hollow — a key advantage for gardeners who can't harvest daily. Best performance is in cool weather; heat will eventually cause bolting.
Growing Tips & Planting Dimensions
- Direct sow only — radishes do not transplant well
- Spacing: Thin to 4–6 inches apart in rows 12 inches apart (needs more room than small radishes)
- Sowing depth: ½ inch
- Succession plant every 2–3 weeks for continuous harvest
- Full sun preferred; tolerates partial shade
- Keep soil consistently moist — uneven watering causes cracking
- Loose, well-drained soil produces the best roots
When to Plant
German Giant is best direct sown outdoors. Sow in early spring as soon as the soil can be worked — radishes thrive in cool soil and tolerate light frost. For a fall crop, direct sow 5–6 weeks before your first expected fall frost. Avoid summer planting in most climates as heat causes bolting. Check your USDA hardiness zone at planthardiness.ars.usda.gov for precise timing.
Companion Plants
-
Lettuce — great row companion; radishes mark slow-germinating rows
-
Carrots — radishes loosen soil and improve carrot germination
-
Cucumbers — radishes may deter cucumber beetles
-
Nasturtiums — attract aphids away as a trap crop
-
Avoid: Hyssop and brassicas that compete for similar nutrients
How to Enjoy
Slice German Giant thick for a dramatic crudité platter, or serve halved with good butter and flaky salt in the classic French style. It's excellent pickled, roasted, or shredded into slaws. The large size makes it ideal for stuffing or hollowing out as an edible vessel for dips and spreads — a real showstopper at the table.
Why Gardeners Love It
German Giant is the radish that stops people in their tracks. The sheer size of the roots is impressive, but what really wins gardeners over is how mild and crisp they are despite their size. It's a conversation starter in the garden and on the plate.
Harvest Tips
Harvest when roots reach 2–3 inches in diameter for peak flavor and texture. German Giant holds in the ground longer than most radishes, but don't wait too long — roots will eventually become pithy. Twist and pull from loose soil or use a garden fork. Remove tops and refrigerate unwashed for up to 2 weeks.
Order Today
Grow the radish that earns a double-take. German Giant delivers impressive size, mild flavor, and reliable performance — a must-have for any heirloom garden.
