The planting of a new garden will be followed by a flood unless there is a drought. The plant you want to grow the most is the one that is the most difficult to grow. If anything goes wrong in your garden, it goes wrong with your favourite plant. If the bugs don't get it, the fungus will. A shrub that is vigorous and showy in your neighbour's garden will turn out scrawny and dull in yours.
Nice plants are easier to pull out than weeds.
The heaviest frost of the winter will occur on the first night that you forget to cover a tender plant. If spraying is carried out in calm conditions, weedkiller will be blown towards the shrubs but insecticide will be blown back in your face. A cricket ball will attain maximum velocity as it hits the glasshouse. Cats find newly planted seed beds superior to kitty litter. Stray livestock will always eat the most desirable plant first.