Re: Yarrow, yarrow, yarrow

It's funny, but what can be invasive for some certainly isn't for others.
 I have several varieties of yarrow -- none of which I would call invasive
 in my garden.  They politely spread a little, but not anything like what
 was described by someone else.

My guess is that the Yarrow that is being refered to as invasive is Achillea ptarmica.  The Yarrows are a large group of plants and with out the proper name it is hard for most people to make diferation of the diffrent forms.

Most garden yarrows are made of Achillea millefolium and the newer hybrids with A. taygetta (? the spelling)
All are sun loving plants that like poor, well draining soils.

Achillea tomentosa is another populare species too.

There are a number of smaller plants used in rock gardens.

Achillea coatacolla ( defanatly the wrong spelling) is a fun plant with white wholly foliage and interseting gold yellow flower heads.

For great cutting material but in it's fresh state ans dried or used as a fall straw flower is Achillea filipendulina , there are a number of forms but all are tall growing (over four feet in my garden) large bright yellow to gold , flat flower heads that are 6 inches or more wide.

The Yarrows grow best in sandy soils in full sun, they respond to being waterd but do not like wet soils. If given to much fertilzer they produce a lot of foliage but few flowers.

They should be divided every three years to eleminate the woody root stock.

Paul


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