Does the humidity factor in at this stage with seeds fresh in the dirt?

Most simple answer is Humidity needs to be over 40 percent but under 70. Higher is better in veg, but bad in flowering.

I would keep your over all humidity in your tent where you're going to want it for veg. Say around 60-65% You don't really have to do anything special for her in my opinion. Hope this helps.

@Organoman - I agree, you only really need humidity domes for cuttings. They won't take without really high humidity as they take their water from the air until the roots develop.

early on higher humidity is recommended. It reduces transpiration and stress on a young plant. It is not required. If you do, you also have to sloly ease it off the excess humidity to harden it off. slowly expose over short period of time to ambient air. Temp + RH% are the primary driver of transpiration in leaves, which is primary driver of water intake to the plant. Read up on VPD - vapor pressure deficit. Not all calculated VPDs mean the same exact thing.. if you reference a table you can see you can react "1.0" an infinite combinations of temp and RH... not all will have exact same reaction, but is still a good guide... as long as it's not an extremem combination, should be similar, though. 100% humidity and super high heat may equate to 1.0 but probably not optimal for mature plants, 1.2-1.5 is probably a good upper range. Seedlings suggest lower VPD around 0.8, but don't quote me on that.. use google. unless you live in a desert or your furnace makes the indoor climate very arid, probably not necessary -- clones benefit more greatly from it during intial rooting phase, though. Even so, it may result in slightly faster growth overall... trial and error.. is it worth it? depends on results of your garden and it's esoteric variables.

In 40 years of growing I have never used a "humidity dome" even once and unless your humidity is zero, I can see absolutely no need for them. Excess humidity and stale air is a far bigger risk for disease than dry air. Others may say "vpd charts" and other scientific crap, but the differences are microscopic and not really relevant to the average home cultivator. If you are growing in average conditions without extreme parameters, don't worry one bit about it would be my advice. Clones/cuttings are the only "plants" that need help with high humidity while they are waiting for roots to form.