The Global Strategy for Plant Conservation still has 16 targets including an all-important eighth on plants at risk, which has seen percentages for targets increased by up to 15%.
At least 75% of threatened species should be protected in "ex situ" collections such as seed banks and botanic gardens by 2020, ideally in their country of origin, governments agreed.
The renewed Global Strategy for Plant Conservation sets higher targets for plant conservation by 2020 and was agreed by the 193 governments.
The deal at COP10, the biological-diversity convention in Nagoya, Japan, was welcomed by Botanic Gardens Conservation International, with 800 member gardens.Suzanne Sharrock, a director of Botanic Gardens Conservation International, said: "Protection of plants and habitats is critical for human wellbeing and prosperity.
"We call on governments to provide sufficient resources for plant conservation so their new commitments aren’t empty promises."