While leafy greens are generally safe, there are a few considerations: - Nitrate Content: Some leafy greens like spinach contain high levels of nitrates, which can be problematic for infants. It's essential to introduce these vegetables gradually and in appropriate quantities. - Allergies: Although rare, some children may be allergic to certain leafy greens. Signs of allergies include rashes, swelling, or difficulty breathing. Consult a pediatrician if any of these symptoms occur.