A fairly accurate guide to harvesting beets is the information provided by the manufacturer on the packaging with the planting material.
It is for this reason that these bags should be stored until the end of the season.
But there are other signs that will be useful if doubts arise.
Typically, the foliage "lies" on the bed, may look dry and even yellowed. This is one of the first and most important signs that it is time to harvest.
You need to dig up a couple of root vegetables and analyze their sizes. As a rule, they should be as promised by the manufacturer.
If the beets are still small, it is too early to dig them up.
Analyze this area of the beet for growths. If they are present, the crop can be safely dug up.
You can also always focus on the ripening dates, which are also indicated by the manufacturer. In this case, it is important to remember the exact date of the planting activities.