(I have asked this question before, but it was a long time ago)
I built a single player Minecraft world with lots of horses and foals. The only problem is that after a while the foals become adult horses. As already mentioned above, I asked this question before and I got the answer that I should install a kind of plugin, but the answer was not where I could get such a plugin or something… You know?
Should go without a plugin. Only then will nothing grow, wheat etc.
/ gamerule randomTickSpeed 0
I also tried the command. Unfortunately, it didn't work…