Answer: Both these plants like full sun, though they'd also do well with a little shade during the hottest part of the day. How much you need to water depends on the size and type of container, soil type, exposure to sun and wind, temperature, and the size of the plant. Your best bet is to feel the soil, and water when the soil begins to dry out. Petunias, especially, don't like to be overwatered, but neither plant will withstand drying out completely. Sorry I can't be more exact, but there is no exact answer.
Q&A Library Searching Tips