Psalm 80:15 New English Translation

¹⁵the root^[a] your right hand planted,
the shoot you made to grow.^[b]

Psalm 80:15 tn The form וְכַנָּה (v^ekhannah, “and a root”) is understood as וְכַנָּהּ (v^ekhannah), taking the ה (he) at the end as the third feminine singular pronominal suffix הּ (he with mappiq is hard “h”) rather than as the noun ending (see HALOT 483 s.v. III כֵּן). Elsewhere the noun refers to a pedestal or base, most often for the wash basin between the tabernacle and the altar. Translations here vary as “root” (NIV), “shoot” (NASB), “stock” (ASV, ESV, RSV), or the contextually driven “vineyard” (KJV).
Psalm 80:15 tn Heb “and upon a son you strengthened for yourself.” In this context, where the extended metaphor of the vine dominates, בֵּן (ben, “son”) probably refers to the shoots that grow from the vine. Cf. Gen 49:22.

New English Translation (NET)