Replace neighbour flowers after ball over fence?

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My neighbours new flowers got crushed by my sons football which went over the back fence while he was playing in the back garden. I know she will have to take some out and replace now.

Should I be offering to replace them, or perhaps let my son take round a new planter with an apology about the ball going over?

We tell him to be careful with it but it accidentally goes over probably once per week.

We did consider those nets back in the day, they do the job but look very ugly. We thought if people like gardening and keeping their garden looking nice they wouldn't appreciate footballs landing in it or a big towering net to look at. Depends on your garden though, obviously.

A ball comes over to my garden occasionally. But rather than a 9 year-old, it is kicked over by one of a group of overgrown teenagers - blokes in their 20's, whilst they smoke weed and drink a few beers at the same time. They don't ask for it back - not a proper football - but rather just climb over and jump into my garden (fence is not high enough at 5' - trellis is planned anyway....), which pisses me off.
One time, they didn't bother getting it and when I saw it later on, I sent it back (only lightweight, not a proper football) by serving like you do in volleyball. It landed two gardens further down.

(I put a note through - no-one in - and made a joke, so they would know where it had gone, starting with Oops! And they managed to take offence at that, referring to it as a "letter" and accusing me of (combined with another issue re. noise) trying to "control everything".)

Ho hum

We have this really often and it's a mixture of balls from lightweight all the way up to heavy rugby balls.
We're redoing our garden and working really bloody hard on it not to mention the cost.
A heavy rugby ball came over the fence and completely snapped some plants we had grown from seed with my DS. I completely had enough, so when I threw it back later I made sure I aimed it for their flower patch.
We've had no balls over since.

Must admit, I feel sad at the thought that a child can no longer play with a ball into the garden when they are not intentionally kicking it over a fence.
Could be perhaps play aiming away from her fence?