Can eucalyptus be planted in Hubei? Where can I buy saplings?

Theoretically, you can plant eucalyptus there, because the natural distribution of eucalyptus can be distributed in the area of 40 degrees south latitude, and the northern hemisphere belongs to the introduction area. Now the fast-growing eucalyptus tree has crossed Dujiangyan in Chengdu and Dongting Lake in Hunan, but it is still very risky to plant the fast-growing eucalyptus tree under the temperature conditions you mentioned, because the cold-resistant temperature of the fast-growing eucalyptus varieties developed now is mostly 2 to 5 degrees below zero, and the duration of low temperature is very strict. I suggest that if you really want to plant eucalyptus in your own place, you can choose a plot with good microclimate and sunny ventilation and try to plant eucalyptus dunnii, eucalyptus grandis or eucalyptus globulus in a small area.