How to make Cymbidium bulbs to sprout

[rodrigo]

A few months ago I carefully detached some bulbs from my strongest Cymbidium plants for the purpose of multiplying them.

Out of the 6 bulbs I detached from the mother plants, 2 sprouted OK, but the other 4 have been "sitting" with no signs of wanting to sprout.

The bulbs look healthy (Dark green and hard) and do not have any signs of deterioration. But now it's being almost 7 months!

I have them enclosed in some transparent flasks with moist paper towels.

What else can I do to make them sprout?

Should I loose hope and just discard them?

Thanks for all your help.

Rodrigo