The management of St Aloysius College recognises that forests, coasts, water bodies, ground water and biodiversity are all important prerequisite for life on this planet and sustainable development.

St. Aloysius College is conscious and committed to the environmental issues with regard to protection, conservation and sustenance of natural resources. Al-Vana is an endeavour to realise such a lofty objective.

Alvana – an Arboretum – with an expanse of about 1.5 acres is maintained as a mini biodiversity spot on the campus with its natural flora and fauna.  About  150 plants  belonging to 70 different  species are maintained  in this  Arboretum.  Among these, 3 species belong to RET category. The floristic components with a good canopy and topography is favourable for the enrichment of the species.

The entire college is involved in the go green project. Organic waste is managed efficiently through vermitechnology programme.  Efforts are made to control carbon dioxide by maintaining clean, green pollution free campus. Al-vana  serves as a focus for reforestation and soil conservation efforts in the area.
 
List of Species
•    Abrus  precatorius L.
•    Acanthus ilicifolius L.
•    Adenanthera  pavonia  L.
•    Adenia  hondala  (Gaertn.) W.J.de Wilde
•    Aglaia elaeagnoidea (A.Juss.) Benth.
•    Ailanthus  triphysa (Dennst.)Alston.
•    Alangium salviifolium (L.f.) Wangerin
•    Alstonia  scholaris (L.)R.Br.               
•    Annona glabra L.
•    Artocarpus  gomezianus  Wall. ex Trecul  subsp. zeylanicus  Jarrett
•    Artocarpus  heterophyllus  Lam.
•    Artocarpus  hirsutus  Lam.     
•    Bambusa  arundinacea  Willd.
•    Bambusa  vulgaris  Schrad.
•    Canthium  dicoccum (Gaertn.) Merr.
•    Carallia brachiata (Lour.) Merr.
•    Careya  arborea  Roxb.
•    Caryota  urens L.
•    Ceiba  pentandra  (L.) Gaertn.
•    Chasallia  curviflora  (Wall.) Thwaites
•    Chonemorpha fragrans (Moon) Alston
•    Cinnamomum   verum  J.S.Presl
•    Citrus  aurantifolia (Christm.) Swingle
•    Coix lacryma-jobi L.
•    Connarus  wightii Hook.f.
•    Cyclea  peltata   (Lam.) Hook.f. & Thomson      
•    Dalbergia horrida  (Dennst.) Mabb.
•    Delonix  regia (Hook.)Raf.            
•    Dregea volubilis  (L.f.) Benth. ex Hook.f.
•    Ensete superbum (Roxb.) Cheesman
•    Ficus  gibbosa  Blume.
•    Ficus exasperata  Vahl
•    Flacourtia   indica (Burm.f.) Merr.
•    Garcinia indica  (Dupetit-Thouars) Choisy  
•    Glycosmis  pentaphylla  (Retz.) DC.
•    Grewia  heterotricha  Mast.
•    Holigarna arnottiana  Hook.f.
•    Hopea  parviflora  Bedd.
•    Houttuynia cordata Thunb.
•    Hybanthus enneaspermus (L.) F.Muell.
•    Hydnocarpus pentandrus (Buch.-Ham.) Oken
•    Indigofera  tinctoria L.
•    Ixora  brachiata   Roxb.
•    Ixora coccinea L.
•    Lagerstroemia  speciosa (L.)Pers.      
•    Macaranga  peltata (Roxb.)Mull.Arg.     
•    Madhuca insignis (Radlk.) H.J.Lam
•    Mangifera  indica  L.     
•    Manilkara  zapota  (L.) P.Royen
•    Memecylon  edule Roxb.
•    Michelia  champaca  L.
•    Mimusops  elengi  L.   
•    Olea  dioica  Roxb.       
•    Oroxylum indicum   (L.) Kurz
•    Peltophorum  pterocarpum (DC.) K.Heyne     
•    Polyalthia  longifolia  (Sonn.)Thwaites    
•    Pongamia  pinnata (L.)Pierre.   
•    Pothos  scandens  L.
•    Premna  latifolia  Roxb.
•    Premna serratifolia L.
•    Pterocarpus  marsupium   Roxb.
•    Salacia chinensis L.
•    Saraca asoca (Roxb.) Willd.           
•    Senna  siamea (Lam.) H.S.Irwin & Barneby        
•    Sterculia guttata Roxb. ex G.Don.
•    Strychnos  colubrina L.
•    Swietenia  mahagony (L.) Jacq.
•    Tectona  grandis  L.f.
•    Terminalia  catappa  L.
•    Tylophora indica   (Burm. f.) Merr.  
•    Typhonium   roxburghii   Schott.
•    Volkameria inermis L.