When Oliver Cowdery took down Joseph Smith’s dictation here, he initially supplied an and (written as an ampersand) between the two resultive that-clauses. But Oliver then erased the ampersand, giving two asyndetic that-clauses. Such usage is possible in the Book of Mormon, as in the following nearby example where several resultive that-clauses are strung together without any and:
Of course, there are also examples of resultive that-clauses where the and is found:
In each case, we therefore follow the earliest textual sources. Here in Alma 32:37 the critical text will accept the immediately corrected reading in 𝓞, without any and between the two resultive that-clauses.
Summary: Maintain in Alma 32:37 the corrected reading in 𝓞 that removed the and between the two resultive that-clauses: “that it may get root / that it may grow up”.