6 Reasons Why You Should Use Foam At The Bottom Of Plant Pots


1. Ideal for shallow root systems

When thinking about matching your favourite plant pot with a plant you’re going to grow, you should choose a pot that's larger than would seem to be necessary at first glance, to take into account the expansion of the root system as the plant matures. Having said that, many plants grown in pots, especially annuals, have shallow root systems that don't reach to the bottom. Using foam in the form of Styrofoam, takes up the space where the roots don't necessarily grow to and, even if they do grow that far down, they'll simply wrap around it.1. Ideal for shallow root systems With an annual, at the end of the season you can easily discard the entire contents and renew it all, foam included, the following year. It’s possible, though, to re-use the soil and foam provided they’re both in good condition once the plant and its roots have been separated. Using either an old piece of hosiery or mesh grocery bag to house the foam makes disposal of it much easier, but be aware that neither are biodegradable.

2. Saves money

When establishing and working within a suitable budget, it's important to maximise expenditure on the plants themselves. Using foam at the bottom of a pot saves money as buying soil and/or compost can be expensive in garden centres and specialist shops. We already know that plants in pots usually have shallower root systems and don't need soil or compost where the roots don't grow so you can save yourself money by filling the unneeded space with re-usable foam polystyrene. To calculate how much foam to use, work on filling a space of not more than about 25% of the height of the pot. This will ensure that there's sufficient space for the roots to flourish whilst leaving enough room for the foam to be effective.

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