Darryl

Thanks for submitting your photos and care details!

Assessment

There are two issues to address here – 1) what to do about the frost damage and 2) the wilted overall plant.

Frost Damage

Unfortunately, there’s nothing you can do to reverse the frost damage – the black spots will be there until the leaf dies off.  If the frost damage was severe, those leaves will eventually turn yellow and die off in a few weeks.  If it was minor, then the die off will occur later.  With good general care, you will be able to enjoy the plant more when it grows new leaves, at which point you can cut off these blemished leaves (or they’ll naturally die off).

For future reference, you should bring in your Monstera when the temperature gets cooler than 50 F (10 C).

Wilted Overall Plant

Your watering strategy needs some adjustment: don’t water a Monstera when its soil is COMPLETELY dry.  It should be watered when the soil is about HALFWAY dry.  Especially if you kept the plant outside, the transpiration would have been much faster than indoors, which means you should be checking your soil dryness every few days and watering whenever the soil is about halfway dry.  You need to use fertilizer on a regular basis if you want long-term growth.  More on fertilizers here: houseplantjournal.com/fertilizer-for-most-houseplants/

Recommendations

• Give the plant a thorough soaking so the roots get a chance to recover from the dryness.  As the root system reestablishes itself, the plant should perk up in a few weeks (a few months if the roots were very dehydrated)
• Leave the damaged leaves alone – they will naturally die off.  Once they are completely dead, then you can pull them off
• Adjust your watering strategy: a Monstera should be watered when the soil is about halfway dry.

Good luck!