Edible flowers · Easy
Calendula
Calendula officinalis
Growing medium or vertical tower.
- EC (mS/cm)
- n/a
- pH
- n/a
- Cycle
- moderate
- Difficulty
- Easy
Sound origin
Calendula officinalis
Probably native to southern Europe, but its very long history of cultivation makes its exact origin unknown.
Source: Wikipedia (in English)
What it provides nutrients
No reference nutritional values have been published for this plant in the Ciqual table (ANSES) or in USDA data: we'd rather not make anything up. Edible flowers are used in small amounts, mostly for color and flavor.
Key steps
- Sow directly in the cube or pot: quick sprouting.
- The petals are eaten, fresh or dried, to color rice, butter or salads.
- Pick regularly: the plant keeps flowering as long as it does not go to seed.
- Watch out for powdery mildew at the end of the season: ventilate.
In which system?
| Tower | NFT | Growing medium | Kratky |
|---|---|---|---|
Approximate calendar
| Sowing | Mar., Apr., May |
| Plants | none |
| Harvest | June, July, Aug., Sept., Oct. |
Garden, patio, balcony: Belgian and northern French climate, earlier farther south. Estimates to adjust with your own dates.
Frequently asked questions
Calendula 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.
Calendula 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.
Calendula: which hydroponic system?
Best suited: growing medium (Dutch bucket). Growing medium or vertical tower.
Calendula: when to sow in Belgium?
Indicative window for a garden, patio or balcony in Belgium or northern France: March, April, and May. Adjust with your own dates.
- Mon Potager Hydroponique dashboard