Wald spreading bug?

[Enjoyment]

I thought that paved area should stop wald from spreading - and even if it shouldn't - I doubt it was intended that wald spread over my farm.
Here's some pics:
Plowed area before harvesting:

And the same area right after harvest (look at the second tile from bottom in right raw):

And a little overal view:

As you can see - the plant-farm was splitted from the -tree farm by paved with brick zone, and more than that - trees from the left doesn't spread the wald even around them, but they do damage my farms as fast as I harvest the crops.
Bug? Or intended game mechanic? If so - could I avoid it by some way? 2-tiles-wide paved area? Paved with stone? Plant a line of grass (would it spread over farm/wald too?)?
UPD: When I took a closer look on first pic - I can say, that the wald was spreaded on that tile even before harvesting...

[Thedrah]

it's intended, the trees growing spawns wald within 2-3 tiles afaik. it's random and doesn't spread from the tree

[Enjoyment]

it's intended, the trees growing spawns wald within 2-3 tiles afaik. it's random and doesn't spread from the tree

Hmm, that's explains some moments, though Im still thinkin wald should not spread over cultivated soil (nor over the paved area), but know I know how to avoid this atleast - should move my tree-farm a little. Thx for the answer.

[min_the_fair]

I haven't got enough of a farm in this world to know if the mechanism has changed, but in Legacy plowed fields would sometimes decay. Is it possible that the plowing has just decayed naturally, and it's nothing to do with the actual trees?

[Enjoyment]

I haven't got enough of a farm in this world to know if the mechanism has changed, but in Legacy plowed fields would sometimes decay. Is it possible that the plowing has just decayed naturally, and it's nothing to do with the actual trees?

I doubt that's the reason - never saw any "plowing decayed" in w8, and that farm was like a day (IRL) age, so it is just as said before - wald spreading is random and doesn't gives a f**k of what's around it...

[Thedrah]

atm ploughed tiles will spread over dirt so i don't think ploughed tiles decay
i watched a dirt area slowly be consumed this world already, it's not intended though

[jorb]

Dropped from growing trees. Not a bug.