Photo: "Radish Microgreens (Raphanus sativus)" by Stacy Spensley
· CC BY 2.0
Radish microgreens · Radish-microgreens
Rambo Radish Microgreens
Annual · Brassicaceae
Rambo Radish is grown for dark purple stems and cotyledons plus a spicy radish bite that arrives fast. It is one of the quickest microgreens, making it useful for beginners who want a colorful tray in under two weeks.
At a Glance
Days to Maturity
6–10 days
Sun
12+ hours
bright light 12-16 hours daily from grow lights or a very bright window
Spacing
0 "
Seed Start
0 weeks
before transplant
Container
Yes
1+ gallon pot
Height
0.1–0.2 ft
Zone Planting Guide
Growing Guide
Germination
Germination Time2–4 days
Optimal Temp70°F
Seed Depth0.12"
Watering
Weekly Water0.5–1 "
NeedsConsistent
MethodBase watering
Soil
pH Range6–7
Soil TypeFine, clean, seed-starting or microgreen medium with good water holding and drainage.
Resilience
Heat: ModerateCold: LowDrought: Low
Common Problems
damping-off
Cause: Overwatering, poor airflow, and contaminated trays let seedling fungi kill stems at the soil line.
Prevention: Use clean trays, bottom-water, keep airflow moving, and avoid oversowing.
mold
Cause: Soaked seed hulls and stagnant humid air encourage surface mold.
Prevention: Rinse seed well, avoid overwatering, and increase airflow after germination.
Nutrition
Feeding IntensityNone feeder
Harvest
Harvest when stems are crisp, tops are upright, and flavor is at its best: stems are richly colored and cotyledons are open but still tender.
Expected Yield0.1–0.3 lbs/plant
Storage
5 days — Keep dry in a sealed container in the refrigerator with a paper towel to absorb moisture.
Sources
seed_catalog
True Leaf Market
university
Penn State Extension
Rambo Radish Microgreens Planting Dates by Zone
Planting dates for Rambo Radish Microgreens vary by USDA hardiness zone. Select your zone below for frost dates, start-indoors timing, and a full monthly planting calendar.
