Step 3Husk the seeds
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Orange seeds have this annoying little husk on them. The husk keeps the seeds from soaking up with water and sprouting inside the fruit. If you peel this off, more of your seeds will germinate. They'll sprout faster too. Most of my seeds sprouted within a week (some varieties take longer, don't get discouraged if yours do) without the husk and I gave up waiting on the ones with the husk. I never found out how long it takes, but it IS a lot longer.
In the case of both Tomato and cucumber seeds you should ferment the seed coating off of the seed instead of manually removing it.
I'd be a little surprised if this wasn't a simliar siutation.
Removing the outer layers of seeds, in my experience, increases the rate of germination, but produces weaker plants in the long run. I don't know if this is the case with citrus, I've never grown any. With many varieties, the process the young plant goes through to generate the pressure to burst the hull strengthens it and helps it survive as it matures.
My plants are growing remarkably well, so I don't know how much difference it makes in plant strength.