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The liquid plant food I applied last week was only a stopgap, what I really needed to do was apply organic material and more importantly test my soil. Saturday I purchased a do-it-yourself kit from Lowe's and established a few things. First, and no surprise, I was in dire need to Nitrogen. I also suspected that my soil pH may be off since some plants weren't growing as quickly as they should and I hadn't tested when I originally broke ground.
To my surprise my pH was very Alkaline (8.0)! While I'm committed to organic gardening and making slow moves with soil conditioning I realized that this would not be good for ANY of the plants in my garden and that immediate action was needed. I ran back to Lowe's and picked up a 5lbs sack of elemental sulfur which will acidify the soil. I spread about 2lbs on the surface along with coated, slow release Urea for nitrogen. I'll work this in later when I do my weekly hoe.
The remaining two tests showed that my Phosphorous was High and that I was low on Potash. Given this dramatic difference I'm going to try a fall planting of Phosphorous loving plants, possibly potatoes, to try to draw down the levels. I was unable to find an organic Potash source at the local garden center so I may have to punt and apply a combination fertilizer.
The last task I accomplished was to "mulch" the existing plants with a large bag of organic "soil conditioner" which in my area is a moist, slightly aged and pulverized sack of bark and wood chips. Looks like mulch, smells like mulch, but breaks down faster.
So how did my soil become so Alkaline so quickly? Folks around here complain about how acidic the clay soil is and regularly spread pelletized lime on their lawns when fertilizing. Heck, I spread lime also and the Bermuda sod loves it. So what gives? Well for starters I applied garden lime to the soil when I tilled, without testing it which is a major no-no. The high soluble phosphorus level is probably a result of my gypsum application and while it shouldn't hurt the garden it will cause runoff of any phosphorous I apply as part of another fertilizer since the soil is already saturated.
Anyway, that's the quick update. The straw bale tomatoes are doing quite well and haven't required water since the bales are still pretty moist and we've received a few inches of rain over the past week. |