Paulownia tomentosa - 100 seeds
This stunning trees has two outstanding features. firstly are its large clusters of fragrant violet flowers, and secondly its large exotic leaves. It also has amazing growth rate, a single shoot will often reach up to 8ft in a season.
Sow in trays, pots, etc of good seed compost in a propagator or warm place to maintain an optimum temperature of 65-70F (18-20C). Sow in well drained compost, just covering the seed with compost, but do not exclude light, which is beneficial to germination. Sow at any time of year. Germination usually takes 21-60 days.
Transplant seedlings when large enough to handle into 7.5cm (3in) pots. Grow on in a cold frame and plant out the following spring in full sun 30cm (12in) apart.
Prefers a sheltered sunny site and a moist, well drained soil.