Massive pots!

[PBandJ111]

I’ve got some huge pots to fill but if I just use soil, it will cost a fortune and weigh a ton. Can I shove empty plastic bottles at the bottom to take up space?

Sounds ok. Or old plant pots.
I've used polystyrene packaging but I think that's a no-no now for environmental reasons.

Probably better to use something more natural, so logs, cardboard, rocks etc

I've seen people using pinecones on Facebook reels recently, which I like the idea of (but obviously the wrong time of year to get any, and also I'd want to check out the pH impact).

I've used old plant pots, drinks cans, cardboard.

We had a load of plastic ball pit balls that were faded and we have used them this year to go in large pots. We have previously used water bottles and milk containers.

I had a professional gardener to my patio pots one year, she put an upturned plastic pot in the bottom of each to take up space, used a lot less compost and the plants did great! Obviously won’t do this with something that stays in the pot a long time like shrubs, but for annuals it’s ideal.

Excellent,thanks. Will go rummage in my recycling bin now!!