Leafy greens and brassicas · Easy
Kohlrabi
Brassica oleracea var. gongylodes
DWC or growing medium, harvest young.
- EC (mS/cm)
- n/a
- pH
- n/a
- Cycle
- short
- Difficulty
- Easy
Sound origin
Brassica oleracea var. gongylodes
Known since ancient times only in cultivation, it became popular in Eastern Europe in the late Middle Ages.
Source: Wikipedia
What it provides nutrients
Per 100 g, raw · Kohlrabi, raw
- Rich in vitamin C
- Source of potassium
- Source of fiber
% of an adult’s reference intake (EU Regulation 1169/2011). “Source of”: at least 15 % per 100 g, “high in”: at least 30 % (thresholds of EC Regulation 1924/2006).
Key steps
- The “bulb” is a swollen stem above the crown: perfect for soilless growing.
- Harvest at 5 to 8 cm in diameter, before it turns woody.
- Fast cycle: staggered sowings in spring and late summer.
- Young leaves are edible, like cabbage.
In which system?
| Tower | NFT | Growing medium | Kratky |
|---|---|---|---|
Approximate calendar
| Sowing | Mar., Apr., May, July, Aug. |
| Plants | none |
| Harvest | May, June, July, Sept., Oct. |
Garden, patio, balcony: Belgian and northern French climate, earlier farther south. Estimates to adjust with your own dates.
Frequently asked questions
Kohlrabi in hydroponics: what pH?
No specific range is published for this crop in the Oklahoma State table: we do not force an unverified figure. Start from the common range of 5.5–7.0 and write down your results.
Kohlrabi in hydroponics: what EC?
Oklahoma State has published no value for this crop. Start low, watch the growth and record your measurements in a log.
Kohlrabi: which hydroponic system?
Best suited: growing medium (Dutch bucket). DWC or growing medium, harvested young.
Kohlrabi: when to sow in Belgium?
Indicative window for a garden, patio or balcony in Belgium or northern France: March, April, May, July, and August. Adjust with your own dates.
- Mon Potager Hydroponique growing benchmarks