Jacobaea maritima silver ragwort, dusty miller
There are several varieties that differ in leaf shape, size, or colour. Very successful is the Silver Dust variety with particularly bright leaves and lower growth. In England, it received the AGM (Award of Garden Merit) for beauty and reliability from the Royal Horticultural Society (RHS). We have not trialled large-leaved varieties yet.
In its native habitat, silver ragwort is a subshrub forming a woody base, growing to less than one meter in height and about half in width as soon as it starts branching out from the second year. In Central European climate, for many years, it was only considered and sold as an annual. But sometimes someone didn't know it, planted it in the garden and lo and behold, it kept on growing even after winter. Surprises often rise from ignorance, so I planted a few of them, too, and it really worked. So far they have withstood -19 °C with the longest life span of 5 years. It may seem short-lived, but given its usually low purchase price, it's always a great buy bringing a lot of excitement to your garden.
Jacobaea loves full sun and can only tolerate a very light partial shade. It copes with heat, wind, drought, and sea salt and requires a well-drained bed with normal or even poor soil. It will even grow on a sandy loam. There is no need for a winter cover so you can enjoy its beauty all year round without virtually no maintenance. Just remove a few old unsightly leaves in spring. There is no need to cut, but overgrown plants can be rejuvenated by hard pruning to a solid framework. The hardiness described above will only work under the growing conditions listed here, and only if planted in the garden – it does not usually survive in outdoor pots after winter.
Last update 06-10-2023; 02-07-2024
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- STANDARD QUALITY - Plants of this group are 1st class quality with number of branches and overall density adequate to their size and age, considering they were container grown.
- DE LUXE QUALITY - This label guarantees a luxurious quality of manually selected plants that, compared to their height and age, are exceptionally dense and beautiful.
- EXTRA - These plants are usually mature and bigger specimens with exceptional overall appearance.
- STANDARD (as described in the plant form) means a tree with a trunk of 190-210 cm and a crown at the top, unless specified differently. The commercial size for trees is their girth measured in the height of 1m from ground.
- HOBBY - These plants are of the same quality as our standard-quality plants but younger and therefore cheaper.
- SHRUB - a woody plant with branches growing bushy from the ground level.
- HALF-STANDARD or MINI-STANDARD - a small tree with shorter trunk, its size is usually specified.
- FEATHERED - These are trees with branches growing already from the base of the trunk and up along the stem.
- GRASSES and PERENNIALS - Sizes given usually read the diameter of the pot or the clump, as specified.