Be aware that Gmelina arborea is severely affected by stem borer attack, controlling which may require investment. Pterocarpus santalinus is slow growing compared to the other two species you have mentioned - it is not a good idea to mix slow growing species with the fast growing species in agro / farm forestry unless you are planning to plant them separately in blocks.The fast growing species will supress the slow growing species if planted in combination.Dear sir I want to plant Pterocarpus Santalinus, Meliadubia, Gmelinaarborea, My land is in karnatak state dharwad dist ,red soil with irrigation. Where can i get best seedlings planing to plant 2acre.: