I went ahead and placed this in the gardening topic since it has headed that way. My (our) main problem growing ANY root plant is the slate and clay soil here. You only have to dig 3-10" in most of the yard to hit slate. So 95% of the garden is in raised beds or planting bags/buckets. Another reason why I struggle with grass, just not enough topsoil to make it thru dry spells. I have added 2-4 inches of dirt and compost over the years to most of the yard, (so, yes there were spots that the slate was practically on top the ground years ago) and I did managed to keep grass in 75-80% of the yard thru this dry stretch. Planted 3 lbs of seed and got 16 pounds of taters out of 7 bags, not great, not terrible. On a side note, this will be the best year ever for carrots!