Celery is a vegetable that needs a lot of nutrients from spring to fall harvest. The type of nutrient supply plays a major role here, because the herb has special requirements during growth. The original distribution gives information.

Expectations
The wild form of celery comes from the Mediterranean region, where it thrives on moist to swampy soil and saline subsoil. In the garden, celery enjoys a heavy and humus-rich soil, while celeriac tends to grow in a sandy and humus-rich subsoil. The pH is ideally between 6.5 and 7.5. The varieties are heavy consumers and have a high nitrogen requirement. The herb needs phosphorus, potash and magnesium in medium concentrations.
spring
In order to give the Mediterranean plant the best possible start to the growing season, you should prepare the soil well. Before planting or direct sowing, work compost into the bed and scatter horn shavings (€32.93) to cover the need for nitrogen. Alternatively, a commercially available vegetable fertilizer is suitable. (7.49 €)
summer
Celery grows between May and September. In mild regions, the harvest extends into October. During this time, the herb attaches great importance to an optimal supply of nitrogen. In order for celeriac to develop magnificent tubers, a supply of potash salts is necessary. You can either use normal table salt or supply the plants with potash fertilizers:
- salt: sprinkle five to ten grams of sea salt per square meter in July or occasionally water with salt water
- Kali: apply a potash fertilizer or pure wood ash twice
- nitrogen: every ten to 14 days pour nettle liquid manure in a ratio of 1:10
tips
Avoid drought and lack of nutrients, as this will cause the plant to start developing flowers prematurely. It does not form a tuber, but shoots up. Mulch the bed with fern leaves or comfrey.
fall
If you want to do without spring fertilization, you can spread compost on the subsoil in autumn. Manure from horses or chickens is also suitable for soil improvement. This gives the microorganisms enough time to release the nutrients. If you dig up the soil after winter, you will get a finely crumbly structure.