Deciding when to hunt from a ground blind and when not to depends on several factors such as the progress of new growth in the woods, the terrain, weather, and how far the breeding season has progressed.

I prefer hunting from a pop-up blind early in the season when there is not much natural cover around. The ground blind allows you to hunt close to the birds without having to worry about them seeing you. Turkeys do not get alarmed by pop-up blinds and you can get away with setting one up in the middle of an open field. 

The main disadvantage to hunting out of a pop-up blind is that your field of view is extremely limited. You can only see so far ahead of you and to the sides and you also greatly limit your shooting opportunities. I have hunted in both blacked out blinds and mesh blinds and prefer the mesh style. The mesh style blind is great for turkey hunting because heat is not trapped inside the blind on those hot spring afternoons and it stays nice and cool. Another advantage is you have 360 degree view of what's around you, but from the outside it's nearly impossible to see what's inside the blind. Adding a pair of decoys within 15 yards of your blind will also help draw the birds in close and help make them comfortable around the blind.

As the season progresses the birds become a bit quieter from all the hunting pressure and will wander more in search of those last few hens that need breeding. A few of the hens who have already bred earlier in the season will loose their nest to predators and breed a second time. 

At this time of year I prefer to wear 3D camo and hunt from a natural ground blind such as a dead fall. With the woods thick from the spring rain fall you will blend right in with the underbrush. Using a natural ground blind gives you greater visibility and also allows your calling to reach further out into the woods which is especially important later in the season as the leaves are coming in.

No matter which type of blind you use or don't use, one thing we all must do is be patient and wait for the bird to present an ethical shot. Remember a turkey's vitals are higher on the body - "hit 'em high and watch 'em die, hit 'em low and watch 'em go."