Flowering Ettinger avocado - is there a way to get some fruit?

[Vlk]

Hi there, I've got a young avocado Ettinger tree that seems to be pushing flower buds out. The thing is, I don't see flower buds on the rest of the trees just yet (they might grow some, but they barely started to create fresh buds after winter, so it is inconclusive just yet). Is there a way to fertilize at least some of the flowers to get some fruit or there is no way to do that, unless I have a flowering A variety synchronized with it?