For April planting, it is important to distinguish between the hardier veg and the more tender.
In sheltered areas in April you can plant outside the hardier vegetable such Broad beans, beetroot, carrots, Swiss chard, summer cauliflower, kohlrabi, lettuce, leeks, radish, turnip, spring peas and perpetual spinach.
Tender vegetables will need to be protected which means germinated and grown on under glass, in a greenhouse or conservatory. Tender vegetables include courgettes, squash, peppers, tomatoes, cucumbers, aubergines, celery, celeriac, French beans, sweetcorn and globe artichokes. Only plant out when the risk of frost has passed.
To prevent the problem of leggy seedlings, if germinating on a windowsill, physically turn the seedling container around each day. This is because when the light comes from one source on one side, i.e. a windowsill the seedlings will grow to the light which can make them leggy. By regularly turning the pot around, it helps to reduce this.
April is also a suitable time to sow in the greenhouse, for planting out later, Peas, and beans-French Green and Runners. To avoid gluts later in the season, sow at regular intervals so the plants flower and fruit at regular intervals.
All peas and beans need a long root run and are best in root trainers which are quite expensive, or toilet roll holders which are cheap. Tips and advice on growing peas and beans.
The planting order for the bean family is that Broad Beans can be planted out in March/April as they are the hardiest of the bean family, followed by Runner beans and French beans if it is sheltered or in May with frost protection.