We’re seeing some leaf yellowing and curling in the cabbages and cauliflowers. Possible causes include iron deficiency, nitrogen deficiency, and “yellows”. Iron deficiency doesn’t seem likely given the number of rusty nails we’ve found. “Yellows” are often associated with excess nitrogen, which is unlikely given the volume of green leaves that the broccoli, brussel sprouts, cabbage, cauliflower, rutabagas, and swedes have put out since the last fertilizer treatment two months ago.
And so a soil test is in order. We sampled four places in the brassica patch, and combined them:
Location |
Area |
pH |
N |
P |
K |
Elements |
Fertilizer |
Amendments |
Brassica patch |
50 sq ft |
not tested |
0/Depleted |
0.5/Depleted |
3/Sufficient |
2.3 oz N plus 1.8 oz P. |
11 ozs 16-16-16 plus 2 ozs 26-3-4 sprinkled along soaker hose. |
none |
We took two samples from the NE corner which is to be the new veggie area, and mixed them for testing.
The corner includes a good-sized rhododendron, a lavender/rosemary patch, and compost space. They aren’t included in the 200sq ft to be treated. There is very little vegetable matter in the soil so we’ll add a lot of compost.
Location |
Area |
pH |
N |
P |
K |
Elements |
Fertilizer |
Amendments |
NE corner |
200 sq ft |
6.7/good |
0/Depleted |
5/Surplus |
0/Depleted |
8.3 oz N plus 10.7oz K. |
4 lbs 16-16-16, raked in. |
8 cu ft compost rototilled in, then 4 cu ft compost raked in with the fertilizer. |
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