Plants require varying amounts of sunlight, and the signs of insufficient sunlight can differ among species. However, some common indicators of insufficient sunlight include elongated and leggy growth, pale or yellowish leaves, and a lack of flowering or fruiting. On the other hand, if a plant receives too much direct sunlight, its leaves may become scorched or show signs of burning. It's important to research the specific sunlight requirements of your plant species and observe how they respond to the light conditions in your garden. Adjust the placement of your plants accordingly to ensure they receive the appropriate amount of sunlight.