HI & welcome to Gardenweb. Pansies like cold weather, so unfortunately that may not go well at this time of year. You might want to try another batch in the fall, when you get the most "bang for your buck." They should last until it gets too hot next summer.

The seed must be fresh. You can store seed in a freezer to extend the vitality. Sow in germination medium and keep evenly moist. I wrap the container in a plastic bag until the seeds germinate. The seedlings are tiny and grow slowly at first. Sometimes my pansies over winter and so it could be worthwhile to sow them now and enjoy the flowers in a few weeks from now.