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Stop worrying if you need to change out your garden soil every season. Learn the reality of soil health and how to maintain it.

Many new gardeners ask whether old dirt goes bad and how often it actually needs to be replaced. This video answers those questions by showing you how different setups, like raised beds and containers, interact with organic matter over time. We break down the layers of your growing medium, including mulch, topsoil, and subsoil, so you can stop guessing and start focusing on your plants.

Proper soil maintenance is the key to a productive season. Whether you are managing container gardening projects or large beds, understanding these fundamentals will save you time and effort. We walk through the visual differences in soil health to help you decide when to amend and when to leave it alone.

Subscribe for weekly vegetable gardening tips, and let me know in the comments if you have questions about refreshing your garden beds this year.
Transcript
00:00All right, guys, welcome back to Grow the Earth.
00:02And I have read comments on the internet pretty regularly, and it's usually a bunch of new
00:10gardeners that are asking, hey, does my soil go bad?
00:15Do I need to change it out?
00:17How often should I change out my soil?
00:21All these questions are, it's not really an easy answer because of the simple fact that
00:30well, it all depends on what type of soil you're talking about and in what setting you're
00:37talking about.
00:39Now, of course, I'm staying out here in our raised beds, and this soil was brought in.
00:45I bought this from a company and had it, you know, put it in here, build these raised beds up.
00:50Now, this soil, you wouldn't change it out as much as you would amend it every year.
00:58With these, the soil is going to rot with the bacteria that's in the soil, and it's going
01:05to shrink over time because of the material that's in it, because of the compost that's
01:11in it, because of the different nutrients and things that are taking out of the soil.
01:17And as it shrinks down in that next season or before that next planting, what we're going
01:23to do is we're going to add compost, and we're going to have fertilizers and stuff to rejuvenate
01:28the soil.
01:29So in this setting, you would never really change out your soil because this is actually
01:37a natural biome.
01:38This is insects and bugs and funguses and different things interacting in an environment to not
01:52only make the soil better over time, but also to make the soil have nutrients available for
02:00the plants that you're planting in it.
02:02So if you put soil in here and then the next year you take all that soil out and you
02:08put
02:08new soil back in it, basically you're starting from zero every time you do that, because now
02:14new soil most times will not have the natural bacteria and things like that that are in this
02:21soil already that is collected from the air, from the water, and from various other places
02:28in order to help your plants grow better.
02:32Probably one of the most beneficial microbes or bacteria that you'd have in your soil is
02:37called mycorrhizae.
02:38And that is actually a bacteria that not only is kind of a soil miner, but it actually attaches
02:45to the roots of those plants.
02:47And it not only sends out little fingers like roots to mine minerals for the plant, but when
02:54it gives those to the plant, the plant gives it back the sustenance to expand and to grow
03:00more.
03:01So it's a beneficial bacteria for your plants.
03:06Now, just like a raised bed, you know, the smaller raised bed or in ground, your taller
03:11raised beds are going to be pretty much the same way.
03:14You're not going to change the soil out because this is a living, working soil that if you've
03:21put the right type of soil in here, if you haven't put a potting soil in here, if you
03:26put a garden bed soil, or if you've gotten soil from a local landscape supplier or something
03:31like that, this is going to have topsoil in it.
03:35This is going to have compost in it, probably some wood products and some other things that
03:41are going to make it a living soil that is going to be regenerative to a certain extent.
03:48And this, again, you're going to add compost to this, you're going to add your fertilizers
03:53to this, and you're just going to mix that stuff into the top layers of that soil and
03:58let it age and it will sink just like I told you previously.
04:04And that's where we're going to add our soil back to every year or whenever we deem that
04:11it's necessary to add more soil to it.
04:13So, one of the one places you probably will change out your soil is whenever you're growing
04:18in pots, and especially if you're using potting soil.
04:23The reason I say that is potting soil has usually a sphagum peat moss, a cocoa core, or a wood
04:32forestry product, something like that, something that is not an actual true soil.
04:36And it has a lot of perlite, a lot of vermiculite, even sometimes pumice in it as a soil aerator.
04:43And over time, what happens is, is that cocoa core or that peat moss breaks down into a compacted
04:51substance, which doesn't absorb water.
04:54It doesn't really, it stops being an aerated soil and it starts being a compacted mess.
05:02Also, what you've got to watch out for in a potted plant that you don't have to deal with
05:06in a raised bed or in an in-ground planting is the fact that there, if it is not in
05:14this
05:14soil, if you don't put it there, it won't be there.
05:18So, any of the micronutrients that you're going to get from natural soil, any of the nitrogens,
05:24any kind of fertilizers, the potassium, all of that stuff, the nitrogen, unless you put
05:32it in this pot, it is not there.
05:35So, over time, it depletes this, and actually it's a soil medium as much as it's more than
05:42it's a soil because there's no actual topsoil in it.
05:45Uh, and the, there's not really any beneficial microbes or bacteria in it because there's
05:54really nothing there for it to work with.
05:56So, with this, you usually get three to five years out of a potted plant before you need
06:03to remove it, add new soil, and put it back in and or up-pot it to give it more,
06:10more area
06:12to draw those nutrients from.
06:15Anything that you'll get from a topsoil, it's not in there.
06:19You know, the, the rock dust and the things like that, that you can't manufacture.
06:26It is not a soil, and it is not containing some of the natural things that a plant needs
06:32to grow.
06:33So, with your soil, it has a soil structure, and that is where your soil structure is going
06:40to be more in play as to why you're not going to change out certain types of soil more than
06:45anything.
06:47Because, your soil structure is, in effect, your soil will naturally separate out into layers.
06:55And I'll put a picture up here to where I can kind of, you know, you can kind of see
06:59what
06:59I'm talking about.
07:01On the very top, you're usually going to have a mulch or a very light soil, and then underneath
07:06that is where your, your compost and your, your kind of stuff that's breaking down is
07:15going to live.
07:16And then as you go further and further down those soil levels, you're going to get into
07:22an area that's going to be very compacted and is going to give the, the soil some substantive
07:28structure to it.
07:32Now, unfortunately, whenever you're dealing with a potting soil, this structure doesn't
07:38exist.
07:39Inside of a pot, that structure doesn't exist.
07:42So, you have very light aerated soil, which is going to be like your top two layers.
07:47That is throughout the whole structure of that pot, and soil is naturally going to want
07:53to separate into those, those different layers.
07:57So, what you end up having is, instead of having a very light, airy soil structure throughout
08:04that potted plant, you end up having all of it start to settle down, and eventually it
08:10becomes a hard mess that has hardly any nutrients in it.
08:16And inside of our raised beds, or in a, or if you're planting in ground, these structures
08:23exist, which is why there is a big push for a no-till gardening, and for all of these other
08:31different types of gardening to where basically, you add to the soil, but you don't, you try
08:35and not disturb the soil, especially when you get down in these couple of bottom layers,
08:40because you are disturbing the bacteria, you're disturbing the microbes, and all of the things
08:46that make your soil healthy.
08:47When you take these bottom layers and you bring it to the top, that encourages compaction,
08:54that encourages soil, microbe, and bacterial die-off, because those soil and those microbes
09:02and those bacteria exist at those layers because they're not being hit by sunlight.
09:09So, the minute you till that, those things up to the top of the soil, they die, because
09:15they can't exist in sunlight.
09:19So, we try not to disturb those layers.
09:22Now, I'm sure there are some people who argue with me.
09:25Big Ag is one who does a lot of tillage and stuff, but they also use commercial fertilizers
09:32fertilizers and non-natural fertilizers in order to grow all of your food that you find
09:37in the store for most accounts.
09:39Me, as an organic gardener, I'm relying on the microbes and the bacteria and my soil to
09:47feed my plants, not a commercial fertilizer that provides exactly what is needed for those
09:54plants to grow.
09:55Because if you didn't know, the fertilizer package that a commercial farmer uses are
10:02tailored to the type of crop they're growing for that season.
10:06So, if they're planting corn, corn has got a very specific type of fertilizer package they
10:13put on the soil for that corn for that grow period.
10:17Whereas, if they're growing a bean or something like that, it's a very different type of
10:25package in order to grow because they are putting exactly what fertilizer they need in that
10:32soil for that particular crop.
10:35And that is it.
10:36So, when they come through and they harvest that crop and they go through and they till
10:42up the soil and now they've destroyed all of that bacteria and those microbes and all
10:47of that stuff and they're actually destroying the structure of that soil, they go back in and
10:53they add what they need right back into that soil in order to grow that specific crop for
10:58that specific time period.
11:01And this brings up a whole other area of why you shouldn't use commercial fertilizers like
11:07that.
11:08But guys, as always, I thank you for joining me today.
11:12I hope you learned something.
11:14If you learned something, I want you to put it down in the comments and I want you to like
11:18and subscribe and share this around.
11:20Help me grow my channel.
11:22And as always, guys, I ask you to pray for your family, pray for your garden, and have
11:27a great day.

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