Will 3-4 hours of sun be enough for a winter greenhouse?

Yes, 3-4 hours of sunlight can be sufficient for a winter greenhouse, especially if it is designed to maximize light capture and retention. However, the effectiveness will depend on factors like the types of plants being grown, greenhouse orientation, insulation, and supplemental heating or lighting. Choosing cold-hardy plants and optimizing conditions can enhance growth even with limited sunlight. Regular monitoring of temperature and humidity is also essential to ensure a suitable environment for the plants.