The aquarium should include a sandy bottom, robust plants, caves, and rocks.

Each robust plant produces many flower heads which hang on nodding branches.

A. broomii is a robust plant with a short stem.

Sunny areas that have recently burned produce the most robust plants.

The majority of species are robust plants that grow readily in cultivation.

It is a robust plant, with large bulbs which have thick fleshy roots.

The farmers' houses are surrounded by the plants, already robust and dark green.

Sweet peas need to start climbing early in order to form robust plants.

This frequently leads to over growth by the strongest weeds, which can quickly choke less robust plants.

These only tend to preserve the more robust plant parts such as seeds or woody stems.