I thought maybe it was the Platinum Ultra blend, which looks like a good one also. The 12 point should work well for a spring planting, especially minus the turnips.

You should still be OK with that location, clover in particular can tolerate shade fairly well. Soil acidity could be an issue there if no lime has been applied. The tree's could impact the plot more in dry weather, the roots can pull moisture in a major way.

You might want to consider sowing some oats along with that mix to help with weed control until the clover and other seeds can become established.