Britain experienced its hottest June day for 40 years last Wednesday (21st) as Heathrow recorded 34.5C, the Met Office has reported. It was the highest June temperature since the 28th June 1976 (35.6C) and the first time the mercury has hit 30C or over on five consecutive days in June since 1995.
This has had a detrimental impact on lettuce, especially iceberg and apollo, (as well as other crops). As growers struggle to keep up with water use and evapotranspiration, nutrient flow (especially calcium) to the quick growing new leaf is insufficient and the leaf turns brown. This can be very hard to remove and means crop is normally ploughed in.
This can be common in iceberg but I have not seen it internally on apollo before, illustrating how extreme the temperatures have been. This week looks to be a bit cooler so hopefully crops will recover somewhat – fingers crossed!
27th June 2017
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