Irises forum: Fertilizer

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Name: Richard
Joshua Tree (Zone 9a)
Birds Irises Ponds Orchids
Apr 15, 2016 6:16 PM CST
I know this is a subject of a personal nature to some. When you fertilize your irises, do you prefer a liquid or a crystal form. What brand do you use?

I live in an area that's kind of limited of choices to Wal-Mart, Home Depot and a local nursery that's knowledgeable but close a lot cause he cant find good help to run nursery when he does landscaping jobs.

So I am just using compost mixed in the soil and Alpaca Manure, but I know the manure is not a fully balanced plant nutrient I don't think.
Name: Jen Jax
Northern Kentucky (Zone 6a)
Irises Peonies Region: Kentucky Dog Lover Enjoys or suffers cold winters
Apr 15, 2016 6:31 PM CST
I just use a basic 10-10-10 for basic fertilizing( I was told by an old farmer this is all they use. So I went with it and it works sprinkle it down and let it go. Now when I am planting new rhizomes in the ground I use triple super phosphate. 0-45-0
Name: Lucy
Hamilton, MA (Zone 6b)
Charter ATP Member Cottage Gardener Enjoys or suffers cold winters Region: United Kingdom Region: Northeast US Irises
Region: United States of America
Apr 15, 2016 9:20 PM CST
5-10-10. the alpacca manure sounds great.
Name: Patrick Alan
Toms River, New Jersey (Zone 7a)
Clematis Irises Region: New Jersey Roses Dog Lover Lilies
Cactus and Succulents
Apr 16, 2016 4:46 AM CST
I find for my own personal use, most things come best from Mail-Order, so that's how I get my
fertilizer, and I use JACK'S BLOOM BOOSTER, which was recommended to me for my Clematis
by a Clematis hybridizer in the Netherlands. I also used it (once) on the Iris in the Spring this year.
Be kind, for everyone you meet is fighting a harder battle ~ Plato
Name: Bonnie Sojourner
Harris Brake Lake, Arkansas (Zone 7a)
Magnolia zone
Region: United States of America Region: Arkansas Master Gardener: Arkansas Irises Plant and/or Seed Trader Moon Gardener
Garden Ideas: Master Level Dragonflies Bulbs Garden Art Celebrating Gardening: 2015 Gardens in Buckets
Apr 16, 2016 6:42 AM CST
Bloom boosters are great as they are usually low in nitrogen. Miracle Gro makes a bloom booster that is 15-30-15 that you mix with water. This is great for annuals and used in a weaker form, more water in the mix than suggested, it works well for irises too.
Who plants a seed beneath the sod and waits for growth believes in God. ~~Unknown
Name: Leslie
Durham, NC (Zone 8a)
Region: North Carolina Irises Cat Lover Garden Photography Enjoys or suffers hot summers Celebrating Gardening: 2015
Apr 16, 2016 7:11 PM CST
Richard - if you have Lowes in your area they have a 5-10-10 bulb booster that I use in the spring.
My road calls me, lures me west, east, south & north; most roads lead men homewards, my road leads me forth. - John Masefield
South central PA (Zone 6a)
Irises Region: Pennsylvania
Apr 16, 2016 7:18 PM CST
Brand of basic fertilizer makes no difference usually. Keep the nitrogen low and if over 10-10-10 sprinkle lightly before a rain; if all 10's or less can put a little more on. Rebloomers take more later in season so good to keep them in separate bed so the others don't get overfed. I have watched 2 front lawn iris beds each on a steep slope for almost 10 years; none has had fertilizer or weeding but full mowing around a month or so before the killing frost. They come back, they bloom. Of course not as nice as other gardens but they are survivors.

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