I thinking of using espoma organic potting mix and espoma plant tone only. Will that work
Yes, it'll work fine -- you could even use the Bio-tone if you wanted go a bit lighter; the Bio-tone is a 4-3-3 and the Plant-tone is a 6-4-4 (*edit* Plant-tone is actually a 5-3-3, not 6-4-4). They actually recommend their tones be used with their soil anyway. Just use 4.5 tbsp of plant-tone per #1 (1 gallon) container full of your potting mix, moisten, and let sit for maybe 3-7 days (ideal, but not necessary) before planting. If you're starting from seed, I would plant into a solo cup of potting mix, minus the plant tone, until your plant has rooted the cup at which point you can plant into a larger pot with the fertilized soil.
Edit:
@az2000 I've been screwing with the recipe a little and I've found that I really don't like the 25% compost in the soil; it's too heavy for me. I prefer a lighter, fluffier soil. So this time around I mixed roughly 10 percent castings with 90 percent Pro-mix HP, 1.25 tbsp of dolomite lime per gallon of base, and per the advice of a local garden store owner, I only added two - two and quarter cups of tone per eight gallons of base vs. the three. I used half Garden-tone (3-4-4, 5% Ca, 1% Mg) and half Bio-tone (4-3-3, 3% Ca, 1% Mg) which together kind of tempers the two to one Ca/Mg ratio of the dolomite lime closer to the more ideal three to one.
I'm really liking the rate of growth in the lighter/fluffier soil vs. the heavier, compost laden soil.
And I'm sure if you were ever to give this style of growing a try, you could improve upon it quite a bit, as much as you like to tinker -- aaaaand I would expect any improvements to be relayed promptly. lol