I am leaving soon to hike the Appalachian trail and I have 3 sweetlee tangerine, 2 poncirus trifoliata, 2 nagami kumquat, 1 meiwa kumquat trees all from seeds. I also have 2 Meyer lemon trees from cuttings. I have found some one to care for them but they don't want any thing to do with feeding them. I thought of using the 2 fertilizers listed below but would like advice

I have these 2 fertilizers that are long term duration.

VIGERO
-------------------------------------TOTAL----------- SOLUBLE
BORON-------------L------------- 0.02%----------- 0.02
COPPER-----------O------------- 0.05%----------- 0.01%
IRON ---------------W -------------1.60%-----------0.90%
MAGNESIUM----------------------1.50%----------- 1.50%
MANGANESE------P------------- 0.05%----------- 0.01
MOLYBDENUM----H -------------0.00%-----------0.0
SULFUR----------------------------5%---------------5.0
ZINC-----------------F------------- 0.05%----------- 0.01%
n---------------------O-------------10%
P---------------------O------------- 8%
K---------------------D------------- 8%

AND

Holy-Tone------N-P-K------------4-3-4

calcium-------------------------------3%
Sulfur---------------------------------2%
Magnesium-------------------------1%

I also inherited 250 Pounds of volcanic ash. I have no idea how to use this. Any help would be appreciated.

Steve