Use good quality, well drained soil and make sure there are adequate drain holes.

使用优质，排水良好的土壤，并确保有足够的排水孔。

youdao

Convolvulus cneorum cultivation notes: Convolvulus prefers a well drained soil - flourishing in sandy or chalky soils.

栽培本种要注意的地方：本种喜排水良好的土壤，在砂质或石灰质土壤中生长良好。

youdao

Improper irrigation practices in areas with poorly drained soil may result in salt deposits that inhibit plant growth and may lead to crop failure.

不适当的灌溉方法的地区排水不良的土壤可能导致盐矿床抑制植物生长，并可能导致作物歉收。

youdao

The soil should be kept moist but well drained so it does not get too wet.

VOA: special.2010.06.29

For potatoes, the best soil is fertile and well drained,not wet.

VOA: special.2009.03.10