Ukraine is the 2nd largest..

..supplier of grains to the European Union. Most wheat crops are planted in fall and harvested in July (spring wheat is planted through March and should be largely in in the soil already).

Even though prices are shooting up, the total planted area is still about in line with with long-term trends. If tensions with Russia will not get resolved however, and the supply lines for fertilizers/pesticides break down further, then the real trouble begins next fall.

Update: France is already considering foot stamp cheques according to news out today.