BOTANY

Detailed explanation-1: -Ground cover is the vegetation (living and dead) and biological crusts that are in contact with the soil surface. Ground cover includes both green (i.e. photosynthetic vegetation) and non-green (i.e. non-photosynthetic dry vegetation and plant litter) areas.

Detailed explanation-2: -Cuttings involve rooting a severed piece of the parent plant; layering involves rooting a part of the parent and then severing it; and budding and grafting is joining two plant parts from different varieties.

Detailed explanation-3: -Herbaceous means that the plant has non-woody stems that reach their full height and produce flower within one year, before dying back over the winter and then reappearing the following spring ready for a repeat performance. The term perennial essentially means that the plant will live for more than two years.

Detailed explanation-4: -The Phlox stolonifera species is the largest among the three. It grows up to 3 – 8 inches tall and can extend indefinitely. The other creeping phlox species grows up to 5 inches tall and 2 feet wide. In contrast, creeping thyme grows only 2 – 3 inches tall.