Reference for Kilayim 7:2
הַמַּבְרִיךְ שָׁלֹשׁ גְּפָנִים וְעִקָּרֵיהֶם נִרְאִים, רַבִּי אֱלִיעֶזֶר בַּר צָדוֹק אוֹמֵר, אִם יֵשׁ בֵּינֵיהֶם מֵאַרְבַּע אַמּוֹת וְעַד שְׁמֹנֶה, הֲרֵי אֵלּוּ מִצְטָרְפוֹת. וְאִם לָאו, אֵינָן מִצְטָרְפוֹת. גֶּפֶן שֶׁיָּבְשָׁה, אֲסוּרָה וְאֵינָהּ מְקַדֶּשֶׁת. רַבִּי מֵאִיר אוֹמֵר, אַף צֶמֶר גֶּפֶן אָסוּר וְאֵינוֹ מְקַדֵּשׁ. רַבִּי אֶלְעָזָר בַּר צָדוֹק אוֹמֵר מִשְּׁמוֹ, אַף עַל גַּבֵּי הַגֶּפֶן אָסוּר וְאֵינוֹ מְקַדֵּשׁ:
If one bent [into the ground] and their roots are visible three vines are bent, [and partly covered with mould], should their stems remain visible, Rabbi Eliezer ben Reb Zadok says, If there [is a space] between them of four to eight cubits, they combine [and is considered a vineyard]. If not, they do no combine. A vine that withered, it is forbidden [to sow seeds within six handreadths because of appearance] but is does not render it forbidden . Rabbi Meir says, Cotton is also prohibited [to be planted because it resembles a vine] but does not render [the vineyard] forbidden [as <i>kilayim</i>]. Rabbi Eliezer ben Rabbi Tsadok said in his [Rabbi Meir's] name, Also above the vine [if one bent a vine branch and did not cover it with at least three handbreadths of soil] it is forbidden to sow seeds] but does not render it forbidden [as <i>kilayim</i>].