Paulownia seeds are sold by specialty tree seed sellers, including TreeHelp's seed collection, which lists both Paulownia tomentosa, the empress tree, and Paulownia fortunei, the foxglove tree. Because the empress tree is considered invasive across much of the eastern United States, state and local rules are worth checking before buying or planting.

Why should local rules be checked before buying empress tree seeds?

Because the empress tree spreads on its own. Its light, wind carried seeds colonize roadsides, stream banks, and disturbed ground, and a cut tree resprouts from its stump and roots, so several eastern states list it as invasive and some areas discourage or restrict planting.

How do the empress tree and foxglove tree differ?

Mainly in climate range and flower color. The empress tree is rated for zones 6 to 7, grows exceptionally fast to about 60 feet, and carries pale violet flowers striped yellow inside. The foxglove tree suits zones 7 to 8, reaches 40 feet or more, and opens 4 inch pearl white flowers flecked with purple before its leaves appear.

How are paulownia seeds sown?

On the surface, with no soaking or stratification, because the seeds need light to germinate. Tamped lightly onto a moist seedbed, Empress Tree Seeds are kept damp under some shade until they sprout.

Frequently Asked Questions

Is foxglove tree seed sown the same way?

Yes. Foxglove Tree Seeds need no scarification or stratification either and are spread on the surface of a moist, lightly shaded bed.

How many seeds come in a packet?

Forty for each species. Refrigerated on arrival, the seeds keep for up to a year.

When are paulownia seeds sown?

The seed listings don't give a season. Because no cold period is needed, sowing usually waits for warm, bright spring conditions outdoors or happens indoors under good light.

Why do paulownia seeds need light to sprout?

Most likely because the seeds are tiny, with little stored food, so sprouting at the surface in light gives a seedling the best start.