As we can see the size below 40mm is disappointing. For example, you can see how the crop may look at the same time - for example in Poland over 50mm:
It is known, however, that the weather greatly affects the overall summary of the season. Last week (marked in red) the temperature and precipitation were as follows:
As you can see the rainfall has arrived, however, it is much too late to improve the situation in the fields.
Source: https://www.weatheronline.co.uk, http://e-warzywnictwo.pl