I'm not sure it's all that important to add it. I used it when I started my beds only cause I thought I had to. I have one growing area that does just fine with native soil and some compost thrown in. The greater importance is mulching. Can't get enough of the mulch now.

Also, I'd say you're overwatering now. I'm currently watering everything every 3 days or so and I haven't mulched yet. I need to soon though. Just because the soil is dry on top doesn't mean it needs to be watered yet. If the soil feels dry 2-3 inches below the surface then it may be time to water. Also, some plants, like squash & peppers, may wilt during the day even when already watered. Doesn't mean they need water, it's just what they do.

Take it from me, when I started I was an avid over waterer. I thought I had to be here, but I've learned some self control over these past few years.

Don't bother. If you have the usual valley clay or silt soil, all you have to do is keep it well mulched.

My raised beds started out with a 50/50 mix of native dirt (heavy clay here) and home-made compost. All I do is keep it topped up with more compost as it decays.