Forests can be owned only by Ukrainian citizens and legal entities. Foreign legal entities and subsidiaries of foreign companies (Ukrainian legal entities with foreign investment) are not authorised to own forests. However, they can lease forest land for up to 50 years. 
"Article 10. The right of private ownership of forests
Forests in Ukraine may be privately owned.
The subjects of private ownership of forests are citizens and legal entities of Ukraine.
[...]
Article 13. Emergence of the right of private ownership of forests [...]
Forests inherited by foreign nationals, stateless persons and foreign legal entities are subject to expropriation within one year.[...]" (Forest Code (№ 3852-XII of 21.01.1994), last amended by Law № 1684-IX of 15.07.2021, Articles 10 and 13 [google translation])
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"Article 19. Term of the land lease agreement
The term of the land lease agreement is determined by agreement of the parties, but may not exceed 50 years.[...]" (Law on Land Lease (№ 161-XIV of 06.10.1998), last amended by Law № 1444-IX of 18.05.2021, Article 19 [google translation])
Forest Code (№ 3852-XII of 21.01.1994), last amended by Law № 1684-IX of 15.07.2021, Articles 10 and 13
Law on Land Lease (№ 161-XIV of 06.10.1998), last amended by Law № 1444-IX of 18.05.2021, Article 19
[<a href="https://zakon.rada.gov.ua/laws/show/3852-12#Text">Code</a>],[<a href="https://zakon.rada.gov.ua/laws/show/161-14#Text">Law</a>]