Why I don't wash my plant pots (and you don't need to either)
Garden of Eatin'

Why I Don’t Wash My Plant Pots (and You Don’t Need To Either)

What I’m about to say goes against traditional wisdom that’s ingrained in nearly every gardener and written about by many a cooperative extension office, but I’m bringing it up to ask a simple question: Why?

Why do we need to wash our dirty pots before starting seeds or putting plants in them?

I confess that I haven’t washed my pots in over seven years, at least not in the way that’s usually advised. Consult almost any gardening guide and the instructions often include scrubbing the pots with soapy water and disinfecting them with a diluted bleach solution.

But I, on the other hand… I am firmly in the brush-off-the-dirt, wipe-off-the-gunk camp of pot cleaning, and I stack my pots in the potting shed like this, ready for the next round of seedlings. (This is the brush I use, which makes quick work of seasonal clean-up, though any stiff bristle brush will do.) Occasionally I hose them off to remove any stubborn and particularly crusty bits, or I wash the pots for aesthetic reasons (mostly for gifting plants to friends).

I’ve amassed a towering collection of seed starting pots, gallon pots, six packs, and seed trays over the years that continues to grow, and I can’t imagine hand-washing (or even hand-soaking) every single one of them at the beginning or end of each season. It seems like a silly waste of effort for not that much benefit. Why, then, are we told to wash our pots at all?

Healthy seedlings started in "dirty" pots

From what I’ve gathered, washing pots supposedly reduces the chances of damping-off disease. Washing pots prevents pests, fungi, or bacteria from hitching a ride on your new plants. Washing pots is a part of good plant health management. All valid reasons, sure, but none that can justify the colossal pain in the butt of washing a pile of pots in the sink, two or even three times when all is said and done.

While pests and diseases can certainly transfer from an old plant to a new one, the chances of that actually happening are slim. There may be the rare occasion that a dirty pot harbors root aphids lurking in leftover soil or spider mites hibernating under the rim, or perhaps a plant you tried to grow in the pot was plagued with allium rust or clubroot.

If any of that were the case, and serious enough to warrant consideration at all, I wouldn’t bother with washing and disinfecting that pot. It’s far more economical to throw it out and use a brand-new pot. The time saved and peace of mind earned is worth the couple extra bucks to replace it. (Not to mention, the common advice of using a 10 percent bleach solution for disinfecting — a dilution of 8000 ppm, or parts per million, more than even the disinfectant level recommended for hospital settings — is insane and sounds like overkill to me.)

As for terra cotta pots: Salts and other minerals that build up on the outside (usually at the base, and caused by fertilizers or hard water) can be unsightly and can sometimes hinder proper drainage if left to accumulate, but those are about the only reasons you’d need to scrub and wash them. The fear of disease running rampant among dirty pots is really, truly overblown.

Gardening myth busted: No need to wash and disinfect your pots

When you think about how plants are grown in their natural environment — outdoors, in the elements, with no coddling from us gardeners — they’re exposed to all the insects and microbes that were there before. Thus, plopping a seed or plant into a dirty pot is no different than plopping it into, well, soil. And how often do you see damping-off in your garden?

Susceptibility to pest or disease is more an unintended outcome of our own tendencies (to overwater, underwater, sow too soon, over-fertilize, or perform any number of other simple mistakes) and less a direct result of secondary infection from a dirty pot. Viable seeds raised under good conditions (where light, moisture, and air circulation are concerned) produce plants that are vigorous enough to withstand your garden-variety microbes.

This is not to to say I advocate poor hygiene or shoddy maintenance when it comes to your tools and equipment. Proper care of pots and other gardening gear goes a long way toward maintaining longevity and sparking joy when you see everything all clean and orderly. But the advice I constantly read about washing and disinfecting your pots seems like a gardening myth that’s oft repeated but lacking in scientific basis.

What are your thoughts? Are you a devoted pot washer, or merely a dirt brusher like me?

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  • Thank you Daria!

  • I don’t think I’d even heard about disinfecting pots with bleach! Haha I barely clean mine up at all. I might spray them off with a hose, but that’s about it!

  • Karen Fergason

    I’m with you, I just brush out the dirt (and spider webs). I’ve had some issues with seedlings damping off this season, but I think it had more to do with my soil medium and not the pot.

    • I usually find that damping off issues are a result of too much moisture or not enough air circulation… nothing that a dirty pot can cause or prevent.

  • My pots are lucky if they even get all of the dirt at the bottom dumped out completely! I’m like you, overkill.

  • Cary Bradley

    Agree wholeheartedly. Of course, if you’ve had a fungal attack of some kind, or have collected pots from unknown source, all bets are off, bleach away, or toss. I think this washing and then bleaching business hails from uptight town, and has no business playing in the dirt with me, and mine. You rock, GB! Sally forth!

  • jeanniebeans

    I’ll also only brush pots, sometimes very lazily, and have yet to have unhappy seedlings or unhappy repotted plants! Agreed that it’s a bit too much; I focus on having high quality potting soil and good conditions to grow.

  • Trixie Reichardt

    As a Master Gardener in Training, I have also been told to wash pots thoroughly and disinfect using a diluted bleach solution. However, in my own garden, I have started to relax a bit and am now just giving pots a rinse in warm water, perhaps a scrub if there is any caked-on dirt, and that’s about it. Saves a ton of time and I have seen no ill effects as of yet. For commercial operations, I can definitely understand that it may not be ideal to chance it.

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