Théodore Dubois, a master of French organ and piano repertoire, composed this charming piece with a focus on melodic clarity and refined expression. It is a quintessential example of French late-19th-century salon music.
The subtle use of rubato is crucial to avoiding a mechanical performance of the 6/8 meter.
Comparable difficulty and character — good candidates for what to learn next.
Au jardin is rated Henle level 4 of 9 — intermediate repertoire, roughly ABRSM grades 5–6. In the RCM system it corresponds to about level 6.
You should be comfortable at Henle level 4 — meaning you can already play level 3–4 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
A typical performance of Au jardin lasts about 3 minutes.
Au jardin is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.
Pieces at a comparable difficulty and character include Berceuse by Théodore Dubois, Bergerette by Théodore Dubois, Ave Maria in A-flat major by Théodore Dubois — see the full similar-pieces list on this page.