It is exhilarating to plant a plant that was previously unknown to me and see that it not only survives but thrives and looks good doing so. I continue to be overwhelmed by the range of choices of plants offered up for rock gardens, most of which I am relatively unfamiliar. The problem is that most are unsuitable for my hot summer rock garden, but I don't know which ones. So when one of my most recent set of recruits does very well in my rock garden I celebrate. Most recently 
Hutchinsia alpina (
Pritzelaga alpina) (Chamois Cress) has fit this success mold. 
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| Hutchinsia alpina gratifying in its adaptability to my garden and a bit ominous in its vigor as it starts only its second year in the garden.  | 
But now as its vigor is displaying itself this first spring after its first winter I wonder if this isn't going to be another of those great rock garden plants that eats the rock garden. I have several. They have the frustrating habit of overwhelming my more demure plant jewels before I realize it. 
Gypsophyla cerastioides (Alpine Baby's Breath), 
Dianthus deltoides  'Arctic Storm', 
Geranium 'Biokovo' (I should have known better; its all out of scale), 
Cymbalaria muralis (Kenelworth Ivy, I did know better; it arrived uninvited), 
Campanula poscharskyana  (Serbian Bellflower, I knew better but thought I could control it). These are representatives of the overly prolific rock garden plants that are consuming my gardens. Will Chamois Cress be another? 
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| Dianthus deltoides 'Arctic Fire' is in danger of overwhelming its more demure neighbors such as in this case, Saponaria pumilio | 
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| A great performance for another context, this Geranium 'Biokovo' is all out of scale and too aggressive for this garden.  | 
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| Kenilworth Ivy is one of those cute little plants that sneaks into your garden, you think its cute for a while and then it gets everywhere.  | 
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Gypsophila cerastioides (Alpine Baby's Breath) Too much of a good thing.  
 
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| Campanula poscharskyana (Serbian Bellflower) is busily pushing out everything around it.  |