This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 圑 is uncertain. It visually combines 囗 (enclosure) with 尃, but the origin and original meaning are unclear.
The enclosure 囗 surrounds 尃, which looks like a hand 寸 spreading something over a field. Picture a fenced garden or plot, but remember its meaning is uncertain.
For ホ, imagine a hoe (ホ) being used inside the enclosed garden: hoe -> ホ, though the kanji's meaning is unclear.