Not every type of vegetables is suitable for indoor cultivation. Vegetables need bees for pollination in general, but there are some that don’t. Either because you eat them before the need for the bee arises, or because the vegetable is actually self pollinating.

A lean-to or conservatory, even a large window is the perfect environment to grow fruiting vegetables, especially varieties that don’t rely on bees or other pollinators. Self-pollinating plants can produce fruit independently, making them ideal for indoor or protected growing spaces, and with the right care, they can yield abundantly all season long. And all the leafy greens will not need pollination as they get harvested as greens… such as salads and microgreens. So you could convert your garage or build a greenhouse for vegetable production all year round in your back garden.

A parthenocarpic plant produces fruit without pollination/fertilization, and the fruit develops without seeds. Humans have selected or engineered parthenocarpic varieties because seedless fruits are easier to eat. There are pros and cons, they are not ideal for your seed saving project but suitable for indoor growing.

Tomatoes

Tomatoes are the quintessential indoor fruiting vegetable. Most varieties are self-pollinating; their flowers naturally release pollen, but a gentle shake or a quick brush of each flower is recommended as it can improve the fruit set. Parthenocarpic varieties go even further, they set fruit without pollination, producing reliably in smaller spaces and less-than-ideal conditions. To get the best results provide at least 6–8 hours of sunlight and if that is not possible, such as in the winter, supplement with grow lights. Maintain consistent moisture, avoiding waterlogging (pot with holes for drainage). For example, use two pots, one with holes and one overpot without holes. To gain viewer but larger tomatoes, pinch off excess shoots in leaf socket (but not the fruiting stems, google this if needed, very important point) to focus energy on fruit development.

Peppers (Bell & Chili)

Peppers are equally well-suited to indoor cultivation. Their flowers are self-pollinating, though gently shaking them can help set more fruit. Keep temperatures warm and stable; peppers thrive around 20–25°C (68–77°F). Use nutrient-rich, airy soil and fertilize lightly every few weeks. Remove any yellowing leaves to encourage airflow and reduce disease risk.

Eggplants

Eggplants, or aubergines, are self-pollinating and produce best with gentle hand-pollination or by creating airflow around flowers. Eggplants need more light than many other vegetables, so it may mean you need to provide strong light (natural or LED). Plant in large containers to accommodate their root systems. Water consistently and maintain soil moisture and prevent cracking.

Cucumbers

Parthenocarpic cucumber varieties thrive indoors without insects. These plants produce long, uniform fruit, perfect for indoor trellises. Train vines vertically to save space and improve airflow. Keep soil evenly moist and feed regularly with a balanced liquid fertilizer. Ensure temperatures stay between 18–25°C (65–77°F) for optimal growth. 

The plants will look decorative in your house and also provide vegetables and maybe you will discover a new hobby. 

In my experience, even self-pollinating plants benefit from light shaking or a small brush to encourage fruit set, some gardeners use an electric toothbrush to do the shaking. Some use a small fan or occasionally open vents to mimic wind, which helps flowers release pollen. Remember that plants, need soil, water, drainage, food and sun light. Place plants in the sunniest part of your lean-to or use LED grow lights to supplement during darker months. Choose pots that allow adequate root space. Tomatoes, peppers, and eggplants need a bucket of 5–10 liters or more depending on the variety. Regular feeding with a balanced liquid fertilizer ensures sustained fruiting indoors.

It will take the plants about 4 months to grow before they will be productive and you will see them develop and grow which is a delight.