Clematis Montana
These seeds include a range of colours from pure white through pinks to red, and all flowers have the most delicious perfume reminiscent of marshmallows.
Cover with compost or grit 5mm deep, and keep moist in a cool, covered light spot outside. No heat is needed. These are often spring germinators. Grow on seedlings in 3†pots, and then plant out in good garden soil.