Reference for Maasrot 5:1

הָעוֹקֵר שְׁתָלִים מִתּוֹךְ שֶׁלּוֹ וְנָטַע לְתוֹךְ שֶׁלּוֹ, פָּטוּר. לָקַח בִּמְחֻבָּר לַקַּרְקַע, פָּטוּר. לָקַט לִשְׁלֹחַ לַחֲבֵרוֹ, פָּטוּר. רַבִּי אֶלְעָזָר בֶּן עֲזַרְיָה אוֹמֵר, אִם יֵשׁ כַּיּוֹצֵא בָהֶם נִמְכָּרִים בַּשּׁוּק, הֲרֵי אֵלּוּ חַיָּבִין:

One who uproots saplings from within his own [property] and plants them [elsewhere] within his own [property] is exempt [from tithes]. If he bought [saplings] attached to the ground, he is exempt. If he gathered them in order to send them to his fellow, he is exempt. Rabbi Elazar ben Azariah says: if similar ones were being sold in the market, behold these require [tithing].

Jastrow