I have a Sea Holly Eryngium "Sapphire Blue" and Rattlesnake Master Eryngium yuccifolium growing in close proximity. Is it possible for these two to hybridize?
Sea Holly and Rattlesnake Master Hybrids?
Hopefully someone comes in and gives you an answer.. I am new to cross pollinating flowers so can't offer any advice. I guess it would depend on the bees and also if you have been trying.
Some plants/trees are wind pollinated so I guess it would depend on which one you have, then they need certain pollen only.