[He may have had it in mind to offer escorting her to where she's going on the basis of letting her borrow his umbrella while they do so, but the offer to re-home this plant at her place comes as a surprise.]

That... doesn't sound like a bad idea, actually. [It's a nice surprise!] If you don't mind it taking up some space in your garden, I didn't have a place in mind for it otherwise.