In article ,
JCeldran_0611 wrote:

Is there anything I can add to soil to increase its chances of
fertility?

N: 18.37 lb. chicken manure/ 100 sq.ft. (2.88 oz/sq.ft.)
P: 3 lb. rock phosphate or (bone meal/ 100/sq.ft. (.48 oz/sq.ft.)
K: The late Bernard G. Wesenberg, a former Washington State University
Extension horticulturist, recommended using one gallon of ashes per
square yard on loam to clay-loam soil, and half as much on sandier soils.
Seaweed extracts may be good for growth by providing micronutrients, and
growth hormones.

Your garden soil shouldn't be more than 10% (by volume), or less than 5%
(by weight) organic material.

Garden soil should be 30% - 40% sand, 30% - 40% silt, and 20% - 30%
clay. You can check your soil by scraping away the organic material on
top of the ground and then take a vertical sample of your soil to 12 in.
(30 cm) deep (rectangular or circular hole). Mix this with water in an
appropriately large glass (transparent) jar. The sand will settle out
quickly, the silt in a couple of hours, and the clay within a day. The
depth of the layer in relationship to the total (layer/total = % of
composition) is the percent that fraction has in the soil.

Garden soil needs a constant input of nutrients, i.e. carbon, e.g. brown
leaves, and nitrogen, e.g. manure in a ratio of C/N of 25. This is the
same ratio you will what in a compost pile.

I know you are in a pot but the same rules apply.

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