As of March 2021, no longer restricted. Previously, foreign investment in plantation seeding and business in an area of 25 Ha or more was limited 95% foreign equity ownership and subject to the 20% "plasma obligation" (i.e. the investor needed to provide the local community with a plantation area of at least 20% of the total area given to the company as stated in its plantation business license).
"APPENDIX III - REGULATION OF THE PRESIDENT OF THE REPUBLIC OF INDONESIA NUMBER 49 OF 2021 CONCERNING AMENDMENT TO PRESIDENTIAL REGULATION NUMBER 10 OF 2021 CONCERNING THE INVESTMENT BUSINESS SECTOR
LIST OF BUSINESS FIELDS WITH CERTAIN REQUIREMENTS
- Plantation with a total area of at least 25 hectare with/without processing unit (in general) [see 2019 restrictions below]: Open (without condition)
- Palm oil – seed plantation with a total area of at least 25 hectare [see 2019 restrictions below]: Open (without condition)[...]" (Presidential Regulation (PERPRES) No. 49 of 2021 Concerning Amendments to Presidential Regulation Number 10 of 2021 concerning Investment Business Fields [google translation])
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Previously: up to 2020
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"APPENDIX III - REGULATION OF THE PRESIDENT OF THE REPUBLIC OF INDONESIA NUMBER 44 YEAR 2016 CONCERNING LISTS OF BUSINESS FIELDS THAT ARE CLOSED TO AND BUSINESS FIELDS THAT ARE OPEN WITH CONDITION TO INVESTMENT - 
LIST OF BUSINESS FIELDS THAT ARE OPEN UNDER SPECIFIC CONDITIONS
A. Agricultural Sector [...]
-Plantation seeding business industry in an area of 25 Ha or more (Jatrophacurcascrops, Other sweetener crops, Sugarcane crops, Tobacco crops, Textile raw materials and cotton crops, Cashew crops, Coconut palm crops, Oil palm crops , Beverage material crops (tea, coffee and cocoa) , Peppercorn crops , Clove crops , Essential oil crops , Medicinal crops /pharmaceutical material crops, Other spice crops, Rubber and other latex-producing crops , Other crops not elsewhere classified ): a. Foreign capital ownership: Max.95%; b. Obligation of 20% Plasma Plantation.
-Plantation business in an area of 25 Ha or more up to a specified area without processing units (Jatrophacurcas plantation, Other sweetener plantation, Sugar cane plantation, Tobacco plantation,  Textile raw materials and cotton plantation, Cashew plantation, Coconut palm plantation, Oil palm plantation , Beverage material plantation (tea, coffee and cocoa) , Peppercorn plantation , Clove plantation, Essential oil plantation, Medicinal/pharmaceutical material plantation, Other spice plantation, Rubber and other latex producing plantation):  a. Foreign capital ownership: Max.95%; b. Obligation of 20% Plasma Plantation.
-Plantation business in a total area of 25 Ha or more integrated to the processing units with the same or exceeding a certain capacity [specific crops similar to the above; for specific informaiton see the link]:  a. Foreign capital ownership: Max.95%; b. Obligation of 20% Plasma Plantation.
-Business with the same or exceeding a certain capacity (Industry of crude vegetable and animal oils (edible oils), Copra, fiber, shell charcoal, dust, nata de coco Industry, Coconut oil Industry , Palm oil Industry, Peeling, cleaning, drying, and sorting of plantation products Industry (cocoa beans and coffee beans),  Industry of sugarcane, cane tops, and bagasse, Black tea/green tea Industry, Dried tobacco leaves Industry, Granular jathropa oil Industry, Cotton fiber and cotton seed Industry, Industry of Rubber to be sheets, concentrated latex , Industry of cashew to be dried cashew nut and cashew nut shell liquid (CNSL) , Industry of Peppercorn to be dried white peppercorn and dried black peppercorn , Dried clove bud industry [...]:  a. Foreign capital ownership: Max.95%; b. Obligation of 20% Plasma Plantation.[...]"(PRESIDENTIAL REGULATION OF THE REPUBLIC OF INDONESIA NUMBER 44 YEAR 2016 CONCERNING LISTS OF BUSINESS FIELDS THAT ARE CLOSED TO AND BUSINESS FIELDS THAT ARE OPEN WITH CONDITIONS TO INVESTMENT)
Presidential Regulation (PERPRES) No. 49 of 2021 Concerning Amendments to Presidential Regulation Number 10 of 2021 concerning Investment Business Fields [google translation]
PRESIDENTIAL REGULATION OF THE REPUBLIC OF INDONESIA NUMBER 44 YEAR 2016 CONCERNING LISTS OF BUSINESS FIELDS THAT ARE CLOSED TO AND BUSINESS FIELDS THAT ARE OPEN WITH CONDITIONS TO INVESTMENT
[<a href="https://peraturan.bpk.go.id/Home/Details/168534/perpres-no-49-tahun-2021">PR49</a>],[<a href="https://peraturan.bpk.go.id/Home/Details/161806/perpres-no-10-tahun-2021">PR10</a>],[<a href="https://peraturan.bpk.go.id/Home/Details/40374/perpres-no-44-tahun-2016">PR44</a>]