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fertilizing siberians

Posted by shelleyh z5 NY (My Page) on
Sun, Apr 20, 14 at 21:42

I put some Siberian irises in last year. Should I fertilize them and with what?


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RE: fertilizing siberians

Good idea to fertilize after spring growth has begun. I like to use low nitrogen (ie. 6-10-8) for ones in the ground. Potted bulbs and iris get Miracle Grow which is higher nitrogen.


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RE: fertilizing siberians

I sprinkle Plant Tone around them in early spring. For a vigorous cultivar like Caesar's Brother, that seems to be enough.

This year, I may try a second feeding with something stronger for some of the less vigorous ones.

I have never heard SI described as heavy feeders. However, some of the varieties I have just seem like they need a little kick. Probably just after they bloom.


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