Comparative quantifiers (davantage de / plus de)

In French, plus and davantage both mean "more," but they have one crucial difference.

"More" with nouns and verbs

To express "more of" a noun, you can use either plus de or davantage de (or d' before a vowel). Davantage de is slightly more formal.

We must plant more native trees.
Nous devons planter plus d'arbres indigènes.

You can use both in the same sentence to vary your vocabulary and avoid repetition:

Reforestation requires more time and more native plants.
Le reboisement demande davantage de temps et plus de plantes indigènes.

Both words can also be used directly after a verb to express doing an action "more."

The forest is degraded, so we must plant more.
La forêt est dégradée, donc nous devons planter davantage.

Adjectives and adverbs

Davantage can NEVER be used with adjectives or adverbs. To say "more [adjective]" or "more [adverb]," you must use plus.

This forest soil is more fragile now.
Ce sol forestier est plus fragile maintenant.
To avoid degrading the soil, you must walk more carefully.
Pour ne pas dégrader le sol, vous devez marcher plus prudemment.

Comparisons with "que"

To explicitly compare two things ("more... than..."), follow either quantifier with que (than).

These thick trunks absorb more carbon than small plants.
Ces gros troncs absorbent davantage de carbone que les petites plantes.