Category Archives: soil

SLC Grower’s Mix

SLC-Growers-MIx-600After watching a couple of years of Monty Don on “Gardeners’ World,” one of the differences I noticed was he doesn’t use peat moss in the U.K. He mainly uses a lot of compost, perlite and grit.  I’ve also never seen him use fertilizer other than compost which he makes himself.

You would be hard pressed to find this mixture in any nursery or big box store.

What I have found is a mix which seems similar to what Monty Don uses.

SLC Grower’s Mix has a combination of pine bark fines, compost and PBH rice hulls, although they wouldn’t tell me the exact percentages.

When I talked to SLC they did indicate that they would recommend using Osmocote if I was planning to grow from small size to large size in a pot. He recommended using a medium dosage.  They do include a small starter nutrition in the mix and a micro-nutrient charge.

The product will be a bit drier since it drains so well. You may have to water more often.

I’m going to be doing some tests with this product versus my standard BX ProMix.  The SLC mix is only $6 per 2 cu. ft. bag.

You would obviously be better off buying the mix in bulk, if you have a place to dump it.

The one odd thing about this mix is that it is in bags which say Cotton Blossom Compost.

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Raised Beds

If you are looking to put in a raised bed garden, here is a nice video. Schools in particular may prefer the three foot width to make it easier for kids to garden in the bed.

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Soils Program

This is a topic that might interest you.
It’s free, but these programs do fill up, so I would register ASAP.
http://www.deercreekalliance.org/soils_ingham

Soil-weboflife

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Growing in Clay

I was recently asked how to plant in clay soil.
Here are some options.

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First off, kill off the grass and weeds. You can cover the area with a tarp or newspaper/cardboard or use a herbicide. Use a lawn mower with a bagger and remove all the weed seeds and waste. You don’t want to have to battle the weeds during that first year.

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The easy way to plant with a clay soil base is to cover the area with 6 to 12 inches of a good soil/compost mix. You plant in the soil mix and not the clay soil. Over time, the roots and earthworms will break up the clay soil.

starting-seeds-outside-01Another option is to plant native seeds in the fall. Make sure the seeds come in contact with the soil. The above are Asclepias tuberosa seeds I planted last fall. I then cover the seeds with a soil mix so that the seeds are covered and will germinate easily in the spring. Native plants don’t need or want good soil for growing.

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If you have the time, energy and money, you can dump lots of compost onto the clay and till it in. You can then plant directly into the soil. Unfortunately, in the process of roto-tilling you will bring up dormant weed seeds and will have to battle the weeds in the spring.

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The final option is to make a hole for each plant and throw away the clay soil. You can then add a potting mix to the hole when you plant. I have used a large bulb planter in the past with this technique and it works well.

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When the plants are growing well, you can add mulch to help with the weeds and conserve water. I usually add a mixture of compost and mulch every year to help feed the plants and improve the soil. Note – I found out that the mixture I got was very hot and killed most of my grass in the center.

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Soil Tests in St. Louis, Missouri

If you are putting in a new garden or you just want to know your soil composition, then a soil analysis is a good place to start.

For only $25.00 there are three places in St. Louis you can take your soil sample to have it analyzed.

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Planting in Clay Soil with a Bulb Planter

bulb-planter-200This week I brought in lots of plants for a school garden, which had not been prepared in any way. Ideally, the soil would have been amended or they would have added 6 to 9 inches of top soil and compost. In this case we were dealing with soil that had landscape fabric on top – probably for years.

After taking the landscape fabric off, the soil turned out to be wet clay which would have been very tough to dig in and impossible to break up.

I had brought my heavy duty bulb planter which made short work of creating nice size holes to put in the plants. This  particular model was made by Hound Dog and is an older model. Its opening tapers from 2 3/8″ to 3 1/4″. You pull on the handle to open up the bottom and release the clay. There appears to be a new model being sold which has some bad reviews. I’d advise buying one from a local store so you can return it if you have trouble.

I added potting soil at the bottom of the hole, put in my plant and added more potting soil.

This technique works very well when you have wet clay soil. You can put in lots of plants with a minimum of time and effort.

airport-elementary-01-300This technique works great for schools which have young kids and terrible soil. Here’s what the end result looks like.

 

 

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Buying Soil for the Garden

I recently had a friend by a soil mix from  St. Louis Composting. It was supposed to be a mix of 50% top soil and 50% compost. She ended up getting big clumps of clay in the soil and I was disappointed in the mix. There response was this, “With the wet winter and now wet spring, it has been hard for us to pull soil out of our fields. This has led us to go to other sources of receiving the material.”  Their new source seems to be more clay than anything like topsoil.

I also went to Grants View library community gardens. They have just completed their raised beds and were also filled with those large boulder like clay clumps. Gateway Greening ordered the same Garden Mix which was supposed to be 50/50 said, “They have a huge facility, so there are always variables in my experience.”

The lesson learned is this.

Go to the source of your soil and check it out before you buy it. Look at it, feel it and check the quality of what they are going to send you.

After they dump the soil on your lot, it’s too late to do anything about it. Check out the soil or soil and compost combination ahead of time and make sure they get exactly what you want.

Note – St. Louis Composting also has a product called SLC Raised Bed Mix which might be better, but is more expensive.

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