The Hoya saga

The Hoya saga

I re-potted one of my hoyas last year and it's still yellow. I cut off all yellow that didn't have a bloom spike. The new growth is green but the old remains yellow. Should I feed it iron again or cut off everything yellow, bloom spikes and all? All its new growth has produced bloom spikes. Photobucket Photobucket Photobucket/lj-cut>
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