Product Review

If growing Helianthemum outside then it is best to sow sunflower seeds outdoors at a depth of 6mm following the last frost of spring. Sunflowers like to grow in a sunny or partially shaded area that has good drainage. they can be grown in most soils but if you want to grow big sunflowers then use a soil that is of pH5 to 7, deep and rich. You can start to grow sunflowers indoors first. When planting sunflower seed indoors sow them in peat pots about three weeks before the last frost of spring. They will take about 10 days to germinate at a temperature of 21 to 30 degrees centigrade. The sunflower seedlings should then be transplanted about a metre apart after the last frost of spring.