Almost any vegetable will grow well in full sun, as long as you give it enough water. Some vegetables, however, either thrive in full sun or don't grow well in partial sun or shade. If you are fortunate enough to have full sun in your entire garden, you can plant virtually any vegetable crop. If only part of your garden gets full sun, a number of vegetables won't grow well in shadier areas of your garden.
Cucumbers grow well in full, hot sun. Be sure you water very well during the hot season, though, to keep the soil under the plants from drying out. Cucumbers also benefit from soils that drain well and are high in organic matter. Adding organic matter, like compost, when planting cucumbers can help your soil retain moisture during hot afternoons. When growing cucumbers in full sun, water the plants in the morning to ensure that the soil retains adequate moisture throughout the day.
Peppers--hot, sweet and bell--grow best in full sun. Peppers are tolerant of any type soil, as long as it drains well and retains adequate moisture during the hot afternoons. Peppers grown in full sun tend to develop better than peppers grown in partial shade. Full sun also minimizes fungal problems with your pepper plants.
Tomatoes are most productive in full sun. When planting tomatoes, consider planting several varieties that mature at different rates to create a sequential harvest that will last longer than planting a single variety. Full sun helps to reduce problems with fungal infestations on the leaves and stems of your tomatoes. Most tomato varieties do best when planted 12 inches apart and planted in such a way that they, or nearby plants, won't shade other tomato plants. Tomatoes do well in many soils, but do exceptionally well in loose, well draining soil augmented with compost or composted manure.