{"id":17135,"date":"2025-02-05T11:37:46","date_gmt":"2025-02-05T10:37:46","guid":{"rendered":"https:\/\/treevaset.com\/essentiel-bonsai\/entretien-bonsai-ligustrum\/"},"modified":"2026-11-12T09:04:25","modified_gmt":"2026-11-12T08:04:25","slug":"entretien-bonsai-ligustrum","status":"publish","type":"post","link":"https:\/\/treevaset.com\/fr\/essentiel-bonsai\/entretien-bonsai-ligustrum\/","title":{"rendered":"Ligustrum vulgare en bonsa\u00ef (tro\u00e8ne commun)\u00a0: guide d\u2019entretien"},"content":{"rendered":"

Le Ligustrum vulgare<\/em><\/strong>, ou tro\u00e8ne commun, est une esp\u00e8ce semi-persistante appr\u00e9ci\u00e9e pour sa capacit\u00e9 d\u2019adaptation, son feuillage dense et ses petites feuilles vert fonc\u00e9. Originaire d\u2019Europe et d\u2019une partie de l\u2019Asie, il pousse aussi bien en haie qu\u2019en bonsa\u00ef. Sa croissance rapide et sa bonne r\u00e9ponse \u00e0 la taille en font une esp\u00e8ce int\u00e9ressante pour les d\u00e9butants comme pour les amateurs exp\u00e9riment\u00e9s\u00a0: elle r\u00e9pond aux soins par un feuillage fourni et une ramification fine.<\/p>\n

\n

Le tro\u00e8ne en bref<\/h2>\n
\n
\n
Exposition<\/dt>\n
Plein soleil, 6\u00a0h de soleil direct ou plus\u00a0; un peu d\u2019ombre l\u2019apr\u00e8s-midi au-dessus de 30\u00a0\u00b0C<\/dd>\n<\/div>\n
\n
Arrosage<\/dt>\n
Substrat toujours l\u00e9g\u00e8rement humide\u00a0: les racines fines supportent mal la moindre s\u00e9cheresse<\/dd>\n<\/div>\n
\n
Temp\u00e9rature<\/dt>\n
Rustique\u00a0; pot \u00e0 prot\u00e9ger sous \u22125\u00a0\u00b0C<\/dd>\n<\/div>\n
\n
Engrais<\/dt>\n
Toutes les 2\u00a0semaines, du d\u00e9but du printemps au milieu de l\u2019automne\u00a0: il est gourmand<\/dd>\n<\/div>\n
\n
Rempotage<\/dt>\n
D\u00e9but du printemps\u00a0; tous les 2-3\u00a0ans<\/dd>\n<\/div>\n
\n
Emplacement<\/dt>\n
Dehors toute l\u2019ann\u00e9e\u00a0; semi-persistant, une chute de feuilles en hiver est normale<\/dd>\n<\/div>\n<\/dl>\n<\/div>\n

Vigoureux et tol\u00e9rant, le tro\u00e8ne commun s\u2019adapte \u00e0 une large gamme de climats et d\u2019expositions. Ses branches souples et ses petites feuilles le rendent adapt\u00e9 \u00e0 plusieurs styles de bonsa\u00ef, en particulier le balai (hokidachi), le moyogi (droit informel) et la for\u00eat (yose-ue). En bonne sant\u00e9, le Ligustrum vulgare<\/em> forme une ramure dense et donne m\u00eame au d\u00e9but de l\u2019\u00e9t\u00e9 des bouquets de petites fleurs blanches, suivis de petites baies noires qui font contraste.<\/p>\n

\u00c0 quelle fr\u00e9quence arroser un bonsa\u00ef de tro\u00e8ne\u00a0?<\/h2>\n

Arroser un bonsa\u00ef de tro\u00e8ne, c\u2019est garder le substrat toujours humide sans que les racines baignent dans l\u2019eau. L\u2019esp\u00e8ce aime l\u2019humidit\u00e9 et des arrosages r\u00e9guliers, surtout pendant sa p\u00e9riode de croissance, du printemps au d\u00e9but de l\u2019automne. Arrosez abondamment d\u00e8s que la surface du substrat commence \u00e0 s\u00e9cher, en g\u00e9n\u00e9ral tous les jours ou tous les deux jours par temps chaud. Pendant les fortes chaleurs ou par temps venteux, un arrosage quotidien peut \u00eatre n\u00e9cessaire pour \u00e9viter que les feuilles ne fl\u00e9trissent.<\/p>\n

Pendant les mois plus frais, quand la croissance ralentit, espacez peu \u00e0 peu les arrosages, sans jamais laisser le substrat s\u00e9cher compl\u00e8tement. Les racines fines du tro\u00e8ne commun craignent la s\u00e9cheresse, et m\u00eame un dess\u00e8chement bref peut faire tomber des feuilles. Utilisez un arrosoir \u00e0 pomme fine pour un arrosage doux et homog\u00e8ne, jusqu\u2019\u00e0 ce que l\u2019eau s\u2019\u00e9coule librement par les trous de drainage. La r\u00e9gularit\u00e9 compte\u00a0: le Ligustrum vulgare<\/em> pr\u00e9f\u00e8re un substrat toujours l\u00e9g\u00e8rement humide \u00e0 une alternance de s\u00e9cheresse et d\u2019exc\u00e8s d\u2019eau.<\/p>\n

De combien de lumi\u00e8re un bonsa\u00ef de tro\u00e8ne a-t-il besoin\u00a0?<\/h2>\n

Votre bonsa\u00ef de tro\u00e8ne se pla\u00eet en pleine lumi\u00e8re toute l\u2019ann\u00e9e<\/strong>, id\u00e9alement avec au moins six heures de soleil direct par jour<\/strong>. Au printemps et en \u00e9t\u00e9<\/strong>, le plein soleil donne un feuillage dense, des entre-n\u0153uds courts et de nouvelles pousses vigoureuses\u00a0: la base de la ramification fine des bonsa\u00efs adultes. Pendant les journ\u00e9es chaudes du plein \u00e9t\u00e9<\/strong>, surtout dans le sud o\u00f9 les temp\u00e9ratures d\u00e9passent 30\u00a0\u00b0C, un peu d\u2019ombre l\u2019apr\u00e8s-midi prot\u00e8ge les feuilles fines du dess\u00e8chement et de la br\u00fblure.<\/p>\n

En automne<\/strong>, gardez le bonsa\u00ef au soleil pour qu\u2019il fasse des r\u00e9serves avant l\u2019hiver. Quand les temp\u00e9ratures baissent, il peut perdre une partie de son feuillage, surtout dans les r\u00e9gions froides\u00a0: c\u2019est normal pour un tro\u00e8ne semi-persistant. En hiver<\/strong>, quand la croissance ralentit, l\u2019arbre profite d\u2019un emplacement dehors, frais et lumineux. \u00c9vitez les endroits sombres ou ferm\u00e9s\u00a0: m\u00eame en repos, le Ligustrum vulgare<\/em> a besoin de lumi\u00e8re naturelle pour garder des bourgeons sains et pr\u00e9parer la reprise du printemps.<\/p>\n

Quelle temp\u00e9rature pour un bonsa\u00ef de tro\u00e8ne\u00a0?<\/h2>\n

Au printemps et en \u00e9t\u00e9<\/strong>, les journ\u00e9es chaudes et les nuits douces offrent de bonnes conditions pour une croissance vigoureuse et un feuillage dense. Gardez le substrat toujours l\u00e9g\u00e8rement humide et, par grosse chaleur, un peu d\u2019ombre l\u2019apr\u00e8s-midi \u00e9vite la br\u00fblure des feuilles. En automne<\/strong>, quand les temp\u00e9ratures baissent, le tro\u00e8ne commun ralentit naturellement sa croissance et peut perdre une partie de ses feuilles\u00a0: c\u2019est normal pour une esp\u00e8ce semi-persistante.<\/p>\n

En hiver<\/strong>, le Ligustrum vulgare<\/em> profite d\u2019une p\u00e9riode de repos dehors, au frais. Il supporte sans dommage des gel\u00e9es l\u00e9g\u00e8res jusqu\u2019\u00e0 \u22125\u00a0\u00b0C<\/strong> environ, mais si le froid descend plus bas ou si de forts vents sont annonc\u00e9s, placez-le \u00e0 l\u2019abri, dans un ch\u00e2ssis froid, une serre froide ou sur un balcon prot\u00e9g\u00e9. Ne le gardez pas au chaud \u00e0 l\u2019int\u00e9rieur\u00a0: cela perturbe son repos v\u00e9g\u00e9tatif et affaiblit l\u2019arbre.<\/p>\n

L\u2019engrais de votre tro\u00e8ne<\/h2>\n

Le tro\u00e8ne est gourmand. Commencez les apports au d\u00e9but du printemps et continuez toutes les deux semaines jusqu\u2019au milieu de l\u2019automne, avec un engrais liquide \u00e9quilibr\u00e9 (par exemple NPK 10-10-10). En organique, des granul\u00e9s \u00e0 lib\u00e9ration lente tous les 4 \u00e0 6\u00a0semaines conviennent aussi. Pendant la croissance active, des apports r\u00e9guliers donnent un feuillage dense et des pousses vigoureuses.<\/p>\n

Pas d\u2019engrais en hiver\u00a0; reprenez les apports d\u00e8s que les nouveaux bourgeons apparaissent au printemps.<\/p>\n

Vous cherchez un bonsa\u00ef de tro\u00e8ne\u00a0?<\/h2>\n

Nous avons d\u00e9sormais \u00e0 la p\u00e9pini\u00e8re des tro\u00e8nes yamadori (pr\u00e9lev\u00e9s en nature) en formation\u00a0: des Ligustrum vulgare<\/em> sauvages, sortis de haies, avec ces troncs \u00e9pais et tourment\u00e9s qu\u2019un plant de p\u00e9pini\u00e8re met des d\u00e9cennies \u00e0 construire, \u00e2g\u00e9s d\u2019environ huit ans et hauts de 13\u00a0cm. Ci-dessous, l\u2019arbre \u00e0 tronc unique\u00a0; il existe aussi un tro\u00e8ne en c\u00e9p\u00e9e<\/a>. Livraison UE comprise.<\/p>\n\n

Faut-il tailler un bonsa\u00ef de tro\u00e8ne\u00a0?<\/h2>\n

La taille du tro\u00e8ne commun est indispensable et gratifiante. Il supporte tr\u00e8s bien les tailles s\u00e9v\u00e8res, m\u00eame dans le vieux bois, et repart vite. Pour garder la forme, pincez ou rabattez les nouvelles pousses \u00e0 deux ou trois feuilles quand elles se sont allong\u00e9es de 4 \u00e0 5 paires.<\/p>\n

La taille de structure se fait de pr\u00e9f\u00e9rence en fin d\u2019hiver ou au d\u00e9but du printemps, avant la reprise de la croissance. La ligature est possible pendant toute la saison de croissance, mais les jeunes pousses durcissent vite\u00a0: surveillez et ajustez souvent le fil.<\/p>\n

Quand rempoter un bonsa\u00ef de tro\u00e8ne\u00a0?<\/h2>\n

Rempotez tous les deux \u00e0 trois ans, au d\u00e9but du printemps<\/strong>, avant l\u2019ouverture des nouveaux bourgeons. Le Ligustrum vulgare<\/em> aime un substrat drainant, l\u00e9g\u00e8rement acide \u00e0 neutre. Un bon m\u00e9lange\u00a0: akadama, pierre ponce et pouzzolane \u00e0 parts \u00e9gales. Le syst\u00e8me racinaire se d\u00e9veloppe vite\u00a0: au rempotage, vous pouvez raccourcir jusqu\u2019\u00e0 un tiers des racines pour favoriser les radicelles.<\/p>\n

Apr\u00e8s le rempotage, arrosez abondamment et placez le bonsa\u00ef \u00e0 mi-ombre pendant une \u00e0 deux semaines, le temps que les racines reprennent.<\/p>\n

Tro\u00e8ne de Chine ou tro\u00e8ne commun\u00a0: lequel avez-vous\u00a0?<\/h2>\n

La plupart des bonsa\u00efs de tro\u00e8ne vendus en jardinerie et en ligne sont en fait des tro\u00e8nes de Chine (Ligustrum sinense<\/em>)<\/strong>, une esp\u00e8ce asiatique en g\u00e9n\u00e9ral vendue comme bonsa\u00ef d\u2019int\u00e9rieur. Le tro\u00e8ne commun (Ligustrum vulgare<\/em>)<\/strong> est son cousin europ\u00e9en\u00a0: la plante de haie classique, rustique, strictement d\u2019ext\u00e9rieur, avec la m\u00eame croissance vigoureuse et le m\u00eame caract\u00e8re tol\u00e9rant qui font le succ\u00e8s des tro\u00e8nes en bonsa\u00ef.<\/p>\n

Les distinguer demande un peu plus d\u2019attention. Le tro\u00e8ne de Chine a des feuilles plus petites, d\u2019un vert plus clair, et garde l\u2019essentiel de son feuillage sous un climat doux\u00a0; le tro\u00e8ne commun a des feuilles un peu plus grandes, plus fonc\u00e9es et mates, et se comporte presque comme un arbre \u00e0 feuillage caduc dans les r\u00e9gions froides.<\/p>\n

Leur entretien est presque identique, sauf l\u2019hiver\u00a0: un tro\u00e8ne de Chine gard\u00e9 comme bonsa\u00ef d\u2019int\u00e9rieur demande un endroit lumineux et frais, loin du chauffage, alors qu\u2019un tro\u00e8ne commun doit<\/strong> passer son repos v\u00e9g\u00e9tatif dehors. Ce guide est \u00e9crit pour le Ligustrum vulgare<\/em>, mais si vous avez un tro\u00e8ne de Chine cultiv\u00e9 dehors, les conseils d\u2019arrosage, de taille et de rempotage ci-dessus s\u2019appliquent de la m\u00eame fa\u00e7on.<\/p>\n

Pourquoi mon bonsa\u00ef de tro\u00e8ne perd-il ses feuilles\u00a0?<\/h2>\n

La chute des feuilles est l\u2019inqui\u00e9tude la plus courante avec le tro\u00e8ne, et la plupart du temps elle est sans gravit\u00e9. Comme esp\u00e8ce semi-persistante<\/strong>, le tro\u00e8ne perd naturellement une partie de son feuillage \u00e0 la fin de l\u2019automne (la plus grande partie dans les r\u00e9gions froides). Ce n\u2019est pas un arbre malade\u00a0: c\u2019est un arbre qui entre en repos.<\/p>\n

Une chute de feuilles pendant la saison de croissance<\/strong> est un autre signal\u00a0: elle indique en g\u00e9n\u00e9ral que la motte a s\u00e9ch\u00e9, m\u00eame bri\u00e8vement, ou plus rarement un substrat d\u00e9tremp\u00e9. V\u00e9rifiez d\u2019abord votre rythme d\u2019arrosage. Les tro\u00e8nes gard\u00e9s \u00e0 l\u2019int\u00e9rieur perdent aussi leurs feuilles \u00e0 cause de l\u2019air sec du chauffage ou d\u2019un changement brusque d\u2019emplacement. Une fois la cause corrig\u00e9e, la vigueur du tro\u00e8ne lui permet en g\u00e9n\u00e9ral de refaire des feuilles en quelques semaines.<\/p>\n

Probl\u00e8mes courants<\/h2>\n

Les bonsa\u00efs de tro\u00e8ne sont rustiques, mais un manque de soins peut causer des probl\u00e8mes. Des feuilles qui jaunissent indiquent souvent un mauvais drainage ou un manque d\u2019eau\u00a0; un feuillage clairsem\u00e9 peut venir d\u2019un manque de lumi\u00e8re ou d\u2019engrais. Des parasites comme les pucerons, les cochenilles ou les aleurodes peuvent appara\u00eetre en \u00e9t\u00e9\u00a0: traitez t\u00f4t \u00e0 l\u2019huile de neem ou au savon noir. Des taches foliaires d\u2019origine fongique peuvent appara\u00eetre dans des conditions trop humides ou trop ombrag\u00e9es\u00a0: am\u00e9liorez l\u2019a\u00e9ration et retirez les feuilles atteintes si n\u00e9cessaire.<\/p>\n

Avec un bon \u00e9quilibre entre arrosage, lumi\u00e8re et taille, le Ligustrum vulgare<\/em> reste l\u2019une des esp\u00e8ces les plus fiables pour le bonsa\u00ef\u00a0: un arbre r\u00e9sistant, qui r\u00e9pond bien au travail.<\/p>\n","protected":false},"excerpt":{"rendered":"

Comment entretenir un bonsa\u00ef de Ligustrum vulgare (tro\u00e8ne commun), l\u2019arbuste des haies europ\u00e9ennes\u00a0: arrosage, lumi\u00e8re, engrais, taille et rempotage.<\/p>\n","protected":false},"author":44,"featured_media":17134,"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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