Um... I don't think we thought this through...

vp_78March 19, 2014

Last year my husband built me some beautiful planter boxes, where we happily grew tomatoes, among other veggies. I went to our local garden store over the weekend, where they advised us against growing tomatoes in the same soil this year. And there's the flaw in my plan, because that's the only spot where we can grow tomatoes!!!

So now what? The boxes are pretty big -- 4'x2'x2'. What if we empty all of the soil from last year, hose it down, and start fresh? Or is that still too risky?

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greenman28 NorCal 7b/8a

Refresh the soil in the planters, adding a bit of new material, and be sure to fertilize. If you didn't have any diseases last year, it should be fine.

Josh

    Bookmark   March 19, 2014 at 6:08PM
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tapla (mid-MI z5b-6a)

You can do that to guard against wilt diseases. You might load your clean tank sprayer (no herbicides) with a 10% solution of household bleach or H202 and spray it down. Bleach prolly needs rinsing but the H2O2 doesn't. Toss the old soil on the compost pile. If you're up for it, you can make your own soil at (usually) less than half the price of commercially prepared mixes.

Al

Here is a link that might be useful: More about soils if you click me!

    Bookmark   March 19, 2014 at 6:11PM
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seysonn(8a WA/HZ 1)

If you did not have any disease problem, last year , I don't see a reason to toss the old soil or do anything other than refreshing it , adding nutrients, manure etc.

There is an old schooh called "ROTATING CROPS". It is supposed to be a preventive measure, BUT it is not practical for a backyard gardener with limited land/container resources. The guy who advised you, probably did not know what he is talking about. With a small container (several gallons soil) It would be probably wise to change the soil completely but with a big planter (16 cu-ft = over 1/2 cu-yd), which is very similar to a raised bed, replacing the whole thing does not make any sense, at least to me. some of My raised beds are 2.5 ft by 5ft by 1ft ( 12. cu-ft, much smaller than your planter)

This is just my opinion.

    Bookmark   March 21, 2014 at 4:15AM
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lynngun

I think that any diseases in one planting box would easily be transferred to the other boxes. I have planted tomatoes in my garden without worrying about where I planted them last year with no problems yet.

It is also suggested that you do not have potatoes where you had tomatoes last year because they get many of the same diseases. This is a rule I have also had no problem ignoring.

    Bookmark   March 22, 2014 at 10:42PM
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greentiger87

Like everyone else, I would ignore that advice for a home garden. Just be cognizant of the issue if soil diseases become a problem.

    Bookmark   March 26, 2014 at 7:08PM
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seysonn(8a WA/HZ 1)

Another thing is that MOST tomato diseases are AIR BORN.

    Bookmark   March 26, 2014 at 9:19PM
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