Vegetables

Choose vegetables by useful light, root room, and time to harvest—not by the size of the mature produce.

What counts as a container vegetable

Most vegetables sold as seed will grow in a pot, but the ones worth a beginner's first season fall into three groups: leafy crops harvested a few leaves at a time, fast root crops, and compact fruiting plants. Leafy and root crops forgive mistakes because you harvest them young. Fruiting crops ask for more light, more root room, and more patience before anything is edible.

How much light each group needs

This is the decision that settles everything else. Leafy greens such as lettuce, spinach, chard, and kale produce usefully in three to four hours of direct sun. Root crops such as radishes and carrots want four to six. Fruiting crops — tomatoes, peppers, cucumbers, beans — need six or more, and below that they make leaves instead of food. Count the hours before you buy anything.

Root room, honestly

A leafy crop is happy in a 12 to 15 cm deep trough. Carrots need depth proportional to the variety you chose, which is why short cultivars suit pots better than maincrop types. Tomatoes and cucumbers want 30 cm of depth and roughly 20 litres of mix, and a smaller pot is the single most common reason a container tomato struggles all summer.

Where beginners usually go wrong

Buying a tomato plant for a shaded balcony is the classic mistake, because no amount of feeding or watering substitutes for light. The second is treating every pot the same: a 3 litre pot of lettuce and a 20 litre pot of tomatoes need water on completely different rhythms. Check the mix rather than the calendar.

A sensible first choice

If you want something edible within a month, start with loose-leaf lettuce or radishes. If you have genuine full sun and want the classic container crop, start with one compact tomato in the largest pot you can position safely. Both teach you more in one season than reading will.