Water spinach is more suitable for planting on the balcony. Buy lead-containing spinach home. If the soil is better, remove the stems and leaves from it. Plant it in a flowerpot and pour water into it. Strong vitality, easy survival, fast growth, day and night can grow a leaf, high nutritional value.
There is no doubt that tomatoes are the most important vegetables. You can keep them in a flowerpot. Tomatoes need enough sunshine every day (preferably 5-6 hours a day). The size of the container depends on the tomato variety you want to grow. You can try high-yield cherry tomatoes.
Begonia purpurea is also called red cabbage here. In my impression, it should belong to wild vegetables. It can be seen everywhere and does not need management. It can never be eaten, but it can grow after being pinched. You can live by squeezing a root leaf into the soil at will. I heard that nutrition is still very rich! This is the best vegetable I have ever seen.
There are many vegetables suitable for balcony planting, such as spinach, garlic sprouts, leeks, etc. However, it should be noted that balcony vegetables do not absorb as much nutrition as exposed vegetables, so spraying Woye foliar fertilizer is essential.