I planted pansies yesterday. They can handle to cold/frost (they might look a bit sad during a hard frost but they will perk up again quickly -- they key is to keep feeding them w/ fertilizer).
For other annuals -- the geraniums, petunias, or impatients, you have to wait until May.
For the person putting your house on the market you might go buy the pots of blooming daffodils/tulips and put them in pots at strategic spots around your house. If it is to be cold at night, put them inside or in a garage,and put them back out each day.

5/1, the annuals will not look any better if you plant them earlier.

What can you plant now? I'm putting my house on the market next week and want it to look nice.

If you are eager to plant now I'd recommend picking up some pansies. Just try not to plant them someplace where they'll get roasted in the summer--aim for part-shade. If you have a good nursery near you I would go chat with someone there about planting strategies--they can be a great resource.

Seeds can be started indoors much earlier, but you really need to know what you are doing about starting soil, light, watering, proper temperature.

Always always wait until May 1 in this area at least. You will see annuals everywhere as early as March but reputable nurseries will have signs up indicating that what you buy could be killed off by a freeze. I like to do it April 15th just because I'm relieved of taxes but force myself to wait until May.

Last freeze is May 10 in this area. You can plant before, but be prepared. Pansies can plant now.

The average last freeze for this region is mid April. Wait until then to plant, except for something hardy like pansies.

13:32, I'm not OP, but new to the area. Do you mean for planting annual plants or do you mean from seed? I'm assuming you mean little plants, say in a pony pack? (6 pack)

And would the cut off at night be 32F, where you think it's too cold?

For warm weather annuals, wait until the last frost date is past and the ground warms up. I wait at least until the end of April, usually early May. If planted too early in cold wet soil the plants will struggle.
Pansies can go in earlier, but I have never planted them so I would ask at a garden center.

I'd wait another 2 weeks before planting. The 10 day forecast has some pretty cold nights. I guess it also depends how protected the area is - you can get away with doing it earlier if it's near your house, or if you have some pine branches you can throw over them when it gets very cold.

When is a good time to put in the annuals? Have never planted flowers before, excited to get started, but don't want to kill the plants by starting too early. Thanks in advance!