Spider in Worm Bin – How to Clear Them Out

A large spider in a Can o Worms worm farm

I’ll be honest with you. I’m slightly afraid of seeing spiders in my worm farm. In Australia where I live, we have some of the worlds most venomous spiders such as the Redback Spider. You can understand why I don’t like stumbling upon a spider in worm bin.

I don’t really mind small spiders in the worm farm. Most spiders are harmless and are fine to leave alone in the bin. But I can’t stand the large ones, especially if they’re aggressive when disturbed.

Why Do I Have Spiders in My Worm Farm?

Spiders will keep coming back if conditions in the bin are right. Spiders prey on insects. If it gets either too wet or too dry, it’s more likely that there will be more insects. If there are more insects, spiders will likely move in.

Redback Spider in Worm Bin

I’ve seen a few Redback Spiders in my worm farm. Cupboard Spiders are often mistaken for Redback Spiders. They look similar but their venom is less potent. Redback Spiders are more aggressive. And a little known fact is not all Redback Spiders have a red stripe.

How Do I Get Rid Of Spiders in My Worm Farm?

A large aggressive spider lurking in the worm bin

Here’s some tips on how to eradicate spiders in the worm bin:

  1. Worms can only eat a small amount each day. Overfeeding worms will result in excess food rotting away which attracts insects. Avoid overfeeding so that spiders have no insects to eat.
  2. Always keep the bin moist. Spiders prefer dry conditions. Give the bin a good drench if you need to bring the moisture level back up (but don’t go overboard!). Pressure hose the spiders so they know they’re not wanted.
  3. Repel spiders using peppermint, citronella, cinnamon, tea tree, or cloves. Just add a bit here and there as worms have sensitive skins and it can irritate them. You can use oils too. Spray along the sides, lid, legs etc… You can also add some Diatomaceous Earth (DE), which is fossilizd dried sediment, on top of the bedding.

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