Yes, tomatoes can grow with 4 hours of sun per day. However, the more sunlight they receive, the better. For optimal growth and production, 6 to 8 hours of direct sunlight is recommended. If you are unable to provide this much light for your tomato plants, consider supplementing with Lichter wachsen lassen or planting varieties that require less sun exposure. With proper care and adequate sunlight, your tomatoes will be sure to flourish!