Evergreen herbaceous perennials flowering plants

Lithodora diffusa ‘Grace Ward’ (formerly Lithospermum diffusum) – This evergreen perennial has continual bright gentian-blue flowers from late spring through the summer – these are nicely contrasted by the dark green foliage which forms a low mat. It is a good choice for alpine gardens or walls but requires good drainage and acid soils. Grows 4-6″ high by 24″. Zone 6.

Tradescantia x andersoniana ‘Blue & Gold’ (syn. ‘Sweet Kate’, ‘Blue and Gold’) – This Spiderwort features abundant violet-blue flowers in spring, with sporadic blooms throughout the summer. These are borne over bright chartreuse foliage that forms a grass-like mound. It may require part shade in regions with hot summers. Grows 18-22″ high by 18-24″ wide. Zone 3.

Gentiana asclepiadea – Willow Gentian is a native of the mountains of central and southern Europe. It has erect arching stems which bear pairs of 2-3″ long narrow lance-shaped leaves with prominent veining. The deep blue trumpet-shaped flowers are borne in clusters of 2-3 from late summer to autumn. Prefers partial shade. Grows 24-36″ high by 18″. AGM. Zone 6.

Aconitum x cammarum ‘Bicolor’ – This RHS Award of Garden Merit winner is a herbaceous perennial with tall spires of white flowers edged in violet-blue that much resemble the hood on a monk’s cowl. It has dark green deeply divided foliage often mistaken for delphinium and prefers part sun, although it tolerates full sun in coastal BC. Grows 3-4′ high by 18″. Z3.

Meconopsis ‘Lingholm’ (syn. Meconopsis x sheldonii ‘Lingholm Strain’, Meconopsis grandis ‘Blue Ice’) – This fertile cross of M. betonicifolia and M. grandis is more perennial than most Himalayan Blue Poppies and often self-seeds. It bears slightly nodding papery sky-blue flowers with golden stamens from May to June. Best in partial sun or filtered light. Grows 30″ high. Z5

Mulch, houses & your soil

2004-05-04 09:20:12 by pro

I'm not familiar with cedar or Hemlock mulch since I'm in California so I can't speak to whether one is "nicer" than the other. There is a difference between bark mulch and chipped wood, however. Also, some mulches are more acidic than others if that matters for your soil or particular plants.
It's possible you were warned not to mulch too close to your house because termites might like wood mulch. I don't know of any other reason. Mulch itself doesn't usually attract ants but if the Hemlock has sticky sap they might be attracted to that. UC Davis on controlling ants in your house and garden under control: www

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