You don't have to find slats of wood lying around
. There are lumber yards nowadays where they sell wood. They also sell ladders at most home improvement places.
Plants do in fact grow back. I grew up in a house with a garden in which grew pear, apple, and plum trees (espalier style for the plums), black, red and white currant bushes, gooseberry bushes, roses, gladioli, opium poppies, lilies, rhubarb, raspberries, alpine strawberries, cabbages, onions, chives, new potatoes, lettuce, spinach, purple sprouting broccoli, asparagus, carrots, parsley, rosemary and kale, that was surrounded by no less than seven other gardens (weird layout) and I have a garden myself. Most plants will stand a lot of wear and tear. And most children will do as asked when it comes to any plants you are especially worried about. These children are being polite and knocking, so there is no reason to suppose they would behave like wildebeests.
Dogs otoh are often a positive nuisance in gardens due to their propensity to dig..
You cannot damage a ball for the reasons I have stated. You cannot key a car either, for the same reasons. Plants are in a different category of property. You might as well complain about your neighbours smoking upwind of you and making you cough as you sit out doing your crossword as complain about balls coming over a fence and damaging plants. Or complain about grass being trampled on.
www.citizensadvice.org.uk/housing/problems-where-you-live/neighbour-disputes/
'Damage done by children
If a neighbour’s child causes damage to a property, a conciliatory approach to settle the matter is probably the best solution. Legally, the child can be sued for damages if they are old enough to know what they were doing. In practice, this is unrealistic since few courts would look favourably on such an action, and a child is unlikely to have much money to pay any damages. However, the parents of the child may be liable for negligence and damages if they have trusted the child with something dangerous that was beyond their capability to use responsibly, for example, an air gun. The parents may also be liable if they have failed to exercise the control that would be expected of a parent given the child’s age.
Balls and ball games
If a child throws a ball into a neighbour’s property, the neighbour should either hand it back or allow it to be collected. However, as it is a trespass for the ball to cross the neighbour’s boundary, even if it was unintentional, the neighbour would be entitled to financial compensation if any damage has been caused.'
In other words, suck it up.
We are not talking about plants here, but greenhouse or conservatory glass or shattered gnomes.
And no, it's not on to damage someone's property because it's inconvenient or too far away to go to the park and your little one will not get any exercise unless they kick a ball repeatedly in your small garden.
Actually, they are entitled to fair use of their own garden, and outrageous though that may sound to many here that includes kicking a ball daily for hours on end.
I would also like to take this opportunity to point out that these children have not in fact damaged anyone's property, nor have they thrown the ball over deliberately, or cursed, or flung beer bottles or any other anti-social behaviour.
They are guilty of the hanging offence of ringing a doorbell to ask politely for their ball when it goes over.