Govee sells several models on Amazon, but I have no idea of their longevity in a greenhouse environment, as Roberta mentioned.
If you are willing to cough up a few bucks, SensorPush is hard to beat.
I am using Govee, two of them, from last 4-5 months, bought from Amazon, seems to be working fine, can be monitored / compared temperature and humidity hourly/daily/ weekly basis from mobile app.