{"id":17133,"date":"2025-02-05T11:54:01","date_gmt":"2025-02-05T10:54:01","guid":{"rendered":"https:\/\/treevaset.com\/essentiel-bonsai\/entretien-bonsai-lagerstroemia\/"},"modified":"2026-11-10T19:51:02","modified_gmt":"2026-11-10T18:51:02","slug":"entretien-bonsai-lagerstroemia","status":"publish","type":"post","link":"https:\/\/treevaset.com\/fr\/essentiel-bonsai\/entretien-bonsai-lagerstroemia\/","title":{"rendered":"Lagerstroemia indica en bonsa\u00ef (lilas des Indes)\u00a0: guide d\u2019entretien"},"content":{"rendered":"

Le Lagerstroemia indica<\/em><\/strong>, ou lilas des Indes, est un bonsa\u00ef \u00e0 feuillage caduc appr\u00e9ci\u00e9 pour sa floraison d\u2019\u00e9t\u00e9 et pour son \u00e9corce qui s\u2019exfolie et laisse voir des tons lisses et color\u00e9s. L\u2019esp\u00e8ce allie un bel aspect et une bonne r\u00e9sistance, et un entretien r\u00e9gulier lui donne des fleurs vives et une structure affin\u00e9e.<\/p>\n

\n

Le Lagerstroemia indica en bref<\/h2>\n
\n
\n
Exposition<\/dt>\n
Plein soleil, 6\u00a0h de soleil direct ou plus\u00a0; \u00e0 l\u2019abri du soleil de midi en canicule<\/dd>\n<\/div>\n
\n
Arrosage<\/dt>\n
Substrat toujours frais, jamais d\u00e9tremp\u00e9\u00a0; \u00e0 peine humide en hiver<\/dd>\n<\/div>\n
\n
Temp\u00e9rature<\/dt>\n
18-30\u00a0\u00b0C en saison\u00a0; \u00e0 prot\u00e9ger sous \u22125\u00a0\u00b0C<\/dd>\n<\/div>\n
\n
Engrais<\/dt>\n
Toutes les 2\u00a0semaines, du d\u00e9but du printemps \u00e0 la fin de l\u2019\u00e9t\u00e9\u00a0; pause en pleine floraison<\/dd>\n<\/div>\n
\n
Rempotage<\/dt>\n
Fin d\u2019hiver\u00a0; tous les 2-3\u00a0ans tant que l\u2019arbre est jeune<\/dd>\n<\/div>\n
\n
Emplacement<\/dt>\n
Dehors\u00a0; abri lumineux sous \u22125\u00a0\u00b0C<\/dd>\n<\/div>\n<\/dl>\n<\/div>\n

Originaire d\u2019Asie du Sud-Est, le lilas des Indes se pla\u00eet sous les climats chauds et ensoleill\u00e9s et se pr\u00eate bien \u00e0 la culture en bonsa\u00ef gr\u00e2ce \u00e0 sa croissance rapide et \u00e0 ses branches souples. Ses rameaux fins et ses fleurs d\u00e9licates en font un bon choix pour les bonsa\u00efstes qui cherchent un \u00e9quilibre entre force et l\u00e9g\u00e8ret\u00e9.<\/p>\n

\u00c0 quelle fr\u00e9quence arroser un bonsa\u00ef de Lagerstroemia indica\u00a0?<\/h2>\n

Le lilas des Indes aime un substrat toujours frais, mais jamais d\u00e9tremp\u00e9. Au printemps et en \u00e9t\u00e9<\/strong>, quand la croissance et la floraison sont actives, arrosez abondamment d\u00e8s que la surface du substrat est l\u00e9g\u00e8rement s\u00e8che. Par temps tr\u00e8s chaud, un arrosage quotidien peut \u00eatre n\u00e9cessaire.<\/p>\n

\u00c0 l\u2019approche de l\u2019automne<\/strong>, quand l\u2019arbre ralentit sa croissance, espacez peu \u00e0 peu les arrosages. En hiver<\/strong>, quand le bonsa\u00ef entre en repos v\u00e9g\u00e9tatif et perd ses feuilles, gardez le substrat \u00e0 peine humide pour que les racines ne se dess\u00e8chent pas. Veillez toujours \u00e0 un bon drainage\u00a0: le Lagerstroemia indica<\/em> n\u2019aime pas l\u2019eau stagnante, mais il appr\u00e9cie un substrat frais.<\/p>\n

De combien de lumi\u00e8re un Lagerstroemia indica a-t-il besoin\u00a0?<\/h2>\n

Votre bonsa\u00ef de Lagerstroemia indica<\/em><\/strong> se pla\u00eet en plein soleil<\/strong>, qui favorise une floraison abondante et une croissance compacte et \u00e9quilibr\u00e9e. Plus il re\u00e7oit de soleil, plus ses fleurs sont vives et plus ses feuilles restent petites.<\/p>\n

Au printemps et en \u00e9t\u00e9<\/strong>, donnez-lui au moins 6 heures de soleil direct par jour<\/strong>. Sous les climats m\u00e9diterran\u00e9ens ou continentaux chauds<\/strong>, prot\u00e9gez-le du soleil de midi<\/strong> pour \u00e9viter la br\u00fblure des feuilles, surtout pendant les canicules.<\/p>\n

\u00c0 l\u2019automne<\/strong>, quand l\u2019arbre se pr\u00e9pare au repos v\u00e9g\u00e9tatif, le plein soleil continue d\u2019aider l\u2019ao\u00fbtement des nouvelles pousses et avive la couleur de l\u2019\u00e9corce. En hiver<\/strong>, une fois les feuilles tomb\u00e9es, le bonsa\u00ef peut rester dehors \u00e0 un endroit lumineux et abrit\u00e9 tant que la temp\u00e9rature ne descend pas sous \u22125\u00a0\u00b0C<\/strong>. En dessous, placez-le dans un ch\u00e2ssis froid ou une serre froide.<\/p>\n

Quelle temp\u00e9rature pour un bonsa\u00ef de Lagerstroemia indica\u00a0?<\/h2>\n

Sa plage de temp\u00e9rature id\u00e9ale<\/strong> va de 18 \u00e0 30\u00a0\u00b0C<\/strong> pendant la saison de croissance. Dans cette plage, il fait des pousses vigoureuses, un feuillage brillant et ses grappes caract\u00e9ristiques de fleurs d\u2019\u00e9t\u00e9.<\/p>\n

Au printemps et en \u00e9t\u00e9<\/strong>, une chaleur et un soleil r\u00e9guliers stimulent une croissance saine et une floraison abondante. Au-dessus de 32\u00a0\u00b0C, augmentez l\u2019humidit\u00e9 autour de l\u2019arbre et donnez-lui un peu d\u2019ombre l\u2019apr\u00e8s-midi pour \u00e9viter la br\u00fblure des feuilles. Un arrosage suffisant et une bonne a\u00e9ration aident le bonsa\u00ef \u00e0 rester hydrat\u00e9 et au frais pendant les mois les plus chauds.<\/p>\n

\u00c0 l\u2019approche de l\u2019automne<\/strong>, les nuits plus fra\u00eeches et les jours plus courts am\u00e8nent l\u2019arbre vers le repos v\u00e9g\u00e9tatif, souvent avec un feuillage dor\u00e9 ou orang\u00e9. En hiver<\/strong>, le Lagerstroemia indica<\/em> a besoin d\u2019une p\u00e9riode de repos et supporte des gel\u00e9es l\u00e9g\u00e8res jusqu\u2019\u00e0 \u22125\u00a0\u00b0C environ. Si des temp\u00e9ratures plus basses sont annonc\u00e9es, prot\u00e9gez le bonsa\u00ef dans un ch\u00e2ssis froid, une serre froide ou sur un balcon abrit\u00e9<\/strong>, en lui laissant une bonne lumi\u00e8re et de l\u2019air.<\/p>\n

L\u2019engrais de votre Lagerstroemia indica<\/h2>\n

Des apports r\u00e9guliers sont indispensables pour une floraison et une croissance vigoureuses. Commencez au d\u00e9but du printemps<\/strong>, d\u00e8s que les bourgeons gonflent, et continuez toutes les deux semaines jusqu\u2019\u00e0 la floraison.<\/p>\n

Utilisez un engrais \u00e9quilibr\u00e9<\/strong> (par exemple NPK 10-10-10) pendant la croissance active. Une fois la floraison termin\u00e9e, passez \u00e0 une formule pauvre en azote<\/strong> jusqu\u2019\u00e0 la fin de l\u2019\u00e9t\u00e9, pour pr\u00e9parer l\u2019arbre au repos v\u00e9g\u00e9tatif et favoriser l\u2019ao\u00fbtement des rameaux.<\/p>\n

Pas d\u2019engrais en pleine floraison\u00a0: trop d\u2019azote r\u00e9duit le nombre de fleurs.<\/p>\n

Vous cherchez un pr\u00e9-bonsa\u00ef de lilas des Indes\u00a0?<\/h2>\n

Nous ne cultivons pas encore de Lagerstroemia indica<\/em> \u00e0 la p\u00e9pini\u00e8re, et ce sont justement les messages des lecteurs qui nous font choisir les prochaines esp\u00e8ces \u00e0 cultiver.<\/p>\n\n

Faut-il tailler un bonsa\u00ef de Lagerstroemia indica\u00a0?<\/h2>\n

La taille garde votre bonsa\u00ef de lilas des Indes \u00e9l\u00e9gant et bien proportionn\u00e9. Au printemps et en \u00e9t\u00e9<\/strong>, rabattez les nouvelles pousses \u00e0 2 feuilles<\/strong> quand elles en ont form\u00e9 4 \u00e0 6<\/strong>, pour garder la forme et favoriser la ramification.<\/p>\n

La grosse taille de structure se fait en fin d\u2019hiver<\/strong>, avant la reprise de la croissance. L\u2019esp\u00e8ce bourgeonne bien en arri\u00e8re, ce qui lui permet de supporter les coupes plus lourdes. Le Lagerstroemia indica<\/em> r\u00e9agit bien \u00e0 la ligature, surtout sur les jeunes branches. Surveillez souvent le fil\u00a0: l\u2019\u00e9corce est fine et garde des cicatrices si le fil reste trop longtemps.<\/p>\n

Quand rempoter un Lagerstroemia indica\u00a0?<\/h2>\n

Rempotez tous les 2 \u00e0 3\u00a0ans<\/strong> les jeunes arbres et tous les 4 \u00e0 5\u00a0ans<\/strong> les arbres plus \u00e2g\u00e9s. La meilleure p\u00e9riode est la fin de l\u2019hiver ou le tout d\u00e9but du printemps<\/strong>, juste avant l\u2019ouverture des bourgeons.<\/p>\n

Utilisez un substrat drainant<\/strong>, par exemple 50\u00a0% d\u2019akadama, 25\u00a0% de pierre ponce et 25\u00a0% de pouzzolane<\/strong>. Ce m\u00e9lange assure \u00e0 la fois l\u2019a\u00e9ration et la r\u00e9tention d\u2019eau.<\/p>\n

Au rempotage, taillez l\u00e9g\u00e8rement les racines et supprimez les racines \u00e9paisses ou qui tournent en rond, pour favoriser un chevelu fin. Ensuite, gardez le bonsa\u00ef \u00e0 mi-ombre pendant deux semaines et le substrat r\u00e9guli\u00e8rement humide.<\/p>\n

Probl\u00e8mes courants<\/h2>\n

Des feuilles qui jaunissent ou qui tombent pendant la saison de croissance indiquent en g\u00e9n\u00e9ral un manque d\u2019eau ou un exc\u00e8s de chaleur. Une floraison clairsem\u00e9e vient souvent d\u2019un manque de soleil ou d\u2019un exc\u00e8s d\u2019azote.<\/p>\n

Surveillez r\u00e9guli\u00e8rement les pucerons et l\u2019o\u00efdium<\/strong>, surtout pendant les \u00e9t\u00e9s humides. Un rin\u00e7age doux ou un traitement biologique \u00e0 l\u2019huile de neem r\u00e8gle en g\u00e9n\u00e9ral vite ces probl\u00e8mes.<\/p>\n

Avec un entretien r\u00e9gulier et une observation au fil des saisons, le Lagerstroemia indica<\/em> vous donne des ann\u00e9es de floraisons d\u2019\u00e9t\u00e9 color\u00e9es et une belle silhouette d\u2019hiver.<\/p>\n","protected":false},"excerpt":{"rendered":"

Comment entretenir un bonsa\u00ef de Lagerstroemia indica (lilas des Indes)\u00a0: arrosage, lumi\u00e8re, engrais, taille et rempotage.<\/p>\n","protected":false},"author":44,"featured_media":17132,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"no-sidebar","site-content-layout":"","ast-site-content-layout":"full-width-container","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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