Avoid getting the foliage wet and always discard the drained water. Water Sunflower when the top inch of soil is dry. Aim to keep the soil moist -not soggy. For optimum growth, especially focus on regular watering about 20 days before and after flowering. If you experience a very hot, dry day, make sure to give extra water to your sunflower so it does not dry out too much and die.

Stake Sunflower if they grow taller than 3 feet and become top-heavy. Use fabric-covered plant ties to loosely attach the stems to the stakes.

Place Sunflower in an area where they're exposed to at least six hours of full sunlight per day - an east or south-facing window is ideal. If needed, place the pots outside on a sunny patio or balcony, or expose them to fluorescent full spectrum lights.

When planting Sunflower seed indoors sow them in peat pots about three weeks before the last frost of spring.