Crocks can be better than polystyrene in some cases. For example polystyrene can make the pot top heavy and prone to tipping in the wind if it's tall with a narrow base and the plants are tall. I also get woodlice tunneling into my pots through the drainage holes if I don't have crocks to stop them. They don't do any harm but they drag the soil out and make a mess. The holes then make an attractive hidey hole for slugs.
If you can keep your head, while those around you are losing theirs, you may not have grasped the seriousness of the situation.
As I garden only in pots I’ve tried loads of things, each seems to have advantages and disadvantages.
crocs great but I never have sufficient stuff to smash up and I agree if you forget you can get a nasty surprise if you have to handle the soil later.
polystyrine be careful with the depth as some plants don’t like roots dangling outside of soil and especially if you need to really soak your soil (vacations etc) it can make this almost impossible.
old cloth or t. Shirt fabric as a permiable biodegradable liner, lasts a bit longer than the newspaper and performs the same function.
Marne la vallée, basically just outside Paris 🇫🇷, but definitely Scottish at heart.
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crocs great but I never have sufficient stuff to smash up and I agree if you forget you can get a nasty surprise if you have to handle the soil later.
polystyrine be careful with the depth as some plants don’t like roots dangling outside of soil and especially if you need to really soak your soil (vacations etc) it can make this almost impossible.
old cloth or t. Shirt fabric as a permiable biodegradable liner, lasts a bit longer than the newspaper and performs the same function.