However good a gardener you are, there are always outside agencies that do their best to prevent you succeeding.
Weeds will invade your beds and borders, pests will fly in to nibble leaves and suck sap, and diseases will spread death and destruction in their wake.
Grow your plants well, and know what steps to take when you spot a weed, a pest or disease, and you can stay one step ahead.
The definition of a weed is ‘any plant growing in the wrong place’. Weeds compete with your other plants for water, light and nutrients.