The tree's experiments became a collection of 45 different types of citrus fruit grafted on it, with more planted in the botanical gardens.

[1] In 1940 the arctic explorer and Soviet scientist Otto Yulyevich Schmidt visited the tree and botanical garden.

As a token of his love for the nature of his Soviet Union homeland, he grafted a new citrus bud on the crown of the tree.

[1] Among these are the Soviet figure skating Olympic Gold Medalist Irina Rodnina in 1976, and Secretary-General of the United Nations Ban Ki-moon in 2013.

Each graft has a round metal tag attached, with the grafter's name and event's date.