If you live in the city and only have a balcony instead of a garden, you don't have to do without growing your own vegetables. Onions in particular can be wonderfully cultivated here in pots or boxes.
Onions can also be grown individually in narrow pots
Onions in the flower box
Onions are among the relatively undemanding vegetables that can easily be grown in pots or flower boxes (€16.99). They are particularly suitable for autumn cultivation on the balcony. Attractive greenery always adorns the balcony during the winter and fresh onions can be harvested in early spring.
The right cultivation
Onion cultivation on the balcony, especially autumn or winter cultivation, is successful if the conditions for cultivation are right. Are important:
- plenty of sun and warmth (south-facing balcony)
- Sufficiently deep flower boxes (€16.99) or pots (minimum depth 15 cm) for good root development
- humic potting soil for good nutrient supply
Then, in October or November, the onion sets can be planted 10 cm apart in the potting soil.
Water properly
In addition to removing weeds, watering and fertilizing are the most important measures when growing onions on the balcony. Flower boxes or pots should always be watered well so that the water can penetrate deep into the planters. However, it is necessary that these are equipped with a drain. Too much water can run off here, because onions do not tolerate waterlogging.
The easiest way is to check how dry the soil is before watering. Watering is only done when the soil is still dry at a depth of 4 cm.
Fertilize properly
There are a number of rules to follow when fertilizing. If you use large pots filled with compost for cultivation, you only need nitrogen in the form of horn meal, for example. This is quickly decomposed by the soil and releases its active ingredients for the plants.
If the potting soil cannot be fertilized with fresh compost, an organic fertilizer with nitrogen, potassium and phosphorus should be used.