My 5 year estimate was for Paph. philippinense. Sanderianum is much slow growing and as Geoff predicts it might be even 10 years before you can bloom it. Geoff I have been lucky in a way, I got a Sanderianum division 2 years back from a blooming plant for 75 Euros, It has a silver medal from The DOG. It has not bloomed yet hopefully in the coming year. It just produced one new growth since then and it has still not matured.