Trees are living things, they communicate, they help each other, they have sex

Trees reproduce asexually, or through cultivation by humans, and sexually, through the exchange of pollen between male and female reproductive systems. A single tree can produce both male and female flowers, relying on adaptations such as different blooming times to prevent self-pollination.

Articles

• Trees cannot live forever without sex, study shows. [link to BBC article on the subject]
• How Do Trees Reproduce? [link to Article in Sciencing]