Mantanghong

Family: Brassicaceae Root Vegetable

Juicy and vividly sweet, Mantanghong watermelon radish blooms with a crisp, water-bright crunch and a clean, peppery lift that fades into mellow sweetness.

The flesh shows a striking gradient—blush to rosy red—framed by a smooth, pale exterior that feels cool and satin-sleek in the hand. Grow Mantanghong for standout fresh slices and showy radish platters, or for quick roasting and vibrant pickling where its color stays beautifully alive.

Light: Full SunMaturity: 50 DaysHabit: Taproot

Planting schedules and alerts are optimized for Columbus (Zone 6b).

Crop Dates

Milestone	Date
Start Indoors	Direct Sow
Last Frost	Apr 25th
Transplant / Sow Outdoors	Apr 25th
Harvest Begins	Jun 14th
Harvest Ends	Oct 16th

Crop Details

Trait	Value
Days to Maturity	50
Sun Requirements	Full Sun
Growth Habit	Taproot
Support Needed	None
Planting Depth	Normal
Germination Temp (°F)	55
Min Soil Temp (°F)	45
Min Night Temp (°F)	28
Harden Off (days)	Not Required

Culinary Notes

Chef's Note

Mantanghong is a radish you eat for that cold, watery crunch—then the peppery sting fades into clean sweetness before it can get “spicy.” Use it where it stays crisp (slices, quick pickles, fast heat) so the color and juice don’t disappear into mush.

Best Uses

fresh watermelon-radish slicing for crunchy, high-juice platters
quick pickling (fast vinegar cure) to lock in the vivid pink color
short roast or blister in a hot pan until edges turn tender but the center stays lively
thin matchsticks tossed with salt and lime to make a snappy, cooling bite

Flavor Profile

water-bright sweetness crisp, juicy crunch clean peppery lift that mellows quickly satin-smooth flesh with a blush-to-rose gradient

Kitchen Pairings

lime rice vinegar sea salt honey sesame oil fresh cilantro

Frequently Asked Questions

What pest or disease commonly affects Raphanus sativus (mantanghong), and how can I treat it?

For mantanghong, flea beetles (Brassicaceae pests) are a common problem, especially in warm weather, causing small shot-hole damage on leaves. Cover seedlings with fine row cover right after sowing and keep it on until plants are well established; if damage appears, spray with insecticidal soap and remove heavily affected leaves to reduce buildup. Watch for clubroot-related issues (galling on roots) in cool, wet soils—rotate away from Brassicas and avoid planting where clubroot has occurred.

How often should I water mantanghong during the main growing phase?

During the main bulbing phase, keep the soil evenly moist but not waterlogged—aim for a light, consistent moisture level that supports steady growth. In typical home gardens this often means watering about 2–3 times per week, adjusting to rainfall and soil type so the top 1 inch stays damp. Uneven moisture can lead to cracking or woody, unpleasant texture in radish roots.

How do I know when mantanghong is ready to harvest?

Start checking from about day 45–50: harvest when the roots reach their expected size and feel firm. Avoid leaving them in the ground too long after they mature, because Brassica-family radishes can become pithy or get a stronger, more bitter flavor as they overshoot size.