So, we had no rain at all in April. I don't keep daily records, but I'm quite sure we haven't gone a whole month without rain before. As both the garden and the plot are on heavy clay soil, which retains water so well, it takes some time before a lack of rainfall has much effect, especially in spring when the ground is throughly wet after the winter - and this winter, we had significant snowmelt.
By the third week, however, the ground was beginning to feel - and look - more like concrete, with big cracks and I took to watering the alliums, blueberries, asparagus and the seedlings (kailans, beetroot, lettuce, radishes, spinach and chard) every other day. The strawberries are under plastic so I took a chance with them and left them be.
Curiously, this drought which threatened to wilt my early crops and dry up my asparagus spears seemed to have no effect whatsoever on the weeds, which sprang up green and lush as soon as the soil warmed up, just as they always do.