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Bulking the Bottom of Planters

I've got 4 fairly large planters to plant up in about a months time and a while back on a gardening programme I can't recall, I remember someone putting a lighter material at the bottom (polystyrene I think) so it wasn't too heavy. I think it's also been mentioned on here in the past but I don't remember what people said they used. I don't have any polystyrene and the only lighter material I can really think of is straw. What have other people used when doing this?


  • pansyfacepansyface Posts: 21,521
    Bubble wrap?
    Apophthegm -  a big word for a small thought.
    If you live in Derbyshire, as I do.
  • BobTheGardenerBobTheGardener Posts: 11,391
    Any objects which are lighter than soil and won't rot or contaminate the soil, so straw is out.  You could use plastic bottles with the lid screwed on, for example.
    A trowel in the hand is worth a thousand lost under a bush.
  • Buzzy2Buzzy2 Posts: 135
    I have used screwed up old plastic pots on this one, about six years ago!

  • BenCottoBenCotto Posts: 4,118
    Take note of the shape of the planter and the shape and wind resistance of what you’re growing in it. Speaking from experience here, these things matter if you (used to) have an expensive terracotta pot from Italian Terrace 🙁
    Rutland, England
  • AnniDAnniD Posts: 11,154
    edited March 2022
    Good point about the weight @BenCotto .
    I have heard of people using (empty) plastic water bottles.
    Edited sorry, l see @BobTheGardener already suggested that 😊
  • Lizzie27Lizzie27 Posts: 10,790
    You can also use old knackered plastic plant pots or seed trays.
    North East Somerset - Clay soil over limestone
  • Thanks for all the suggestions 🙂 I believe we have some bubble wrap hanging around. 
  • As per @BenCotto I'd rather have some weight in my pots' bottoms
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