The invention relates to a method for planting
impatiens wallerana in a coastal
saline-alkali land. The method comprises the following steps of land preparing, soil improving, planting, water controlling and
fertilizer adding. The soil improving step comprises the processes that
saline-
alkali soil is doped with
river sand, grass carbon and decomposed
cow dung, the soil, the
river sand, the grass carbon and the decomposed
cow dung are proportioned according to the ratio of 2 to 2 to 1 to 1, the land is ploughed and dug, and the ploughing and digging depth is 20-30 cm, so that the soil is sufficiently mixed with the
river sand, the grass carbon and the decomposed
cow dung to be uniform, and then the land is leveled; sampling is conducted, the pH value of the soil is determined, when the pH value of the soil is still larger than 8,
ferrous sulfate needs to be applied to the soil,
ferrous sulfate is mixed with water for spraying according to the amount that when the pH value is decreased by one, 130 g of
ferrous sulfate needs to be applied to per
square meter of the soil, and when the pH value of the soil is smaller than or equal to 8, ferrous sulfate does not need to be applied. By using the method for planting the
impatiens wallerana in the coastal
saline-alkali land, the
survival rate of the
impatiens wallerana can be greatly increased, and the
flowering time and the
turf grass growing time are shortened; when the method is used for planting the impatiens wallerana, flowering can be achieved after 15 days, the best landscape effect can be achieved after 20 days, and the
survival rate reaches 95% or above.