Globularia is a genus of small, rock garden-sized plants in the Plantaginaceae family, with a native distribution centered around Mediterranean Europe. I admired these during our 2012 Balkan expedition, but it wasn’t until we constructed our crevice garden empire, that we really began to have much success with the dryland plants in our wet, humid summer climate.
We’ve now tried 15 of the 22 known globularia species, and have only lost two of those outright. While globularias are usually grown for their puffy blue, ball-shaped flowers in spring, we love species like Globularia repens for its habit as a slow-growing, dense groundcover. The key to our success is a soil mix of 50% Permatill, which is a lava-like popped slate. Hardiness Zone 4b-8a.
In the hot, humid south, the word Dianthus is jokingly translated as “prepare to die”. As of this spring, we’ve grown 169 different dianthus taxa (different accessions). Of those, most are dead, a few are hanging on, and then a much smaller subset are absolutely thriving. Below are a few images from the spring garden of some (but not all) which are thriving spectacularly.
The first image is Dianthus anatolicus, planted in 2020. Virtually unknown by most gardeners, this species is native from the Black Sea region into the West Himalayas. Typically, plants from this region don’t thrive in our heat and humidity, so this was a pleasant surprise. This is growing in our typical compost amended garden loam.
Dianthus arenarius is a Baltic Sea species that has thrived for us since 2018 in our crevice garden.
Dianthus Dianthus kuschakewiczii, aka: D.tianshanicus, a Central Asian native, has also fared amazingly well in our compost ammended beds since 2015. The idea that this tolerates our heat and humidity is quite shocking.
Dianthus plumarius is a well-known garden species, originating from the Northwest Balkan peninsula. It has been grown as a pass-along perennial throughout the Southeastern US for over a century. This species has been cultivated in the UK since 1100AD, and in the US since 1676. Our clone is one that has been passed along in the Birmingham, Alabama area.
The horticultural world has been replete with an array of dianthus hybrids through the years. We’ve managed to kill quite a few, but the ones below have been exceptional in our tough conditions. Dianthus ‘Bright Light’ (aka: Dianthus Uribest52), is a Korean hybrid from the breeding firm, Uriseed, which was derived from crossing Dianthus alpinus (from the Alps) with Dianthus callizones from Romania. Our clumps have been in since 2018, and excelled in unirrigated sections of the garden. This is one of the finest garden dianthus we’ve ever grown.
Dianthus ‘Cherry Charm’ is a Dutch hybrid of Dianthus gratiopolitanus , which has been every bit as exceptional as Dianthus ‘Bright Light’. Our clumps, which are now four years old are nothing short of outstanding.
Dianthus ‘White Crown’ is the smallest of the excellent performing selections in our trial. We have had this in the crevice garden since 2017, growing in 3′ of Permatill, so we doubt this would thrive in typical garden soils. This is a Wrightman Gardens introduction of unknown parentage.
Flowering for the last few weeks is the late winter-flowering groundcover, Arabis procurrens. This Balkan native is a rather amazing evergreen groundcover in the cabbage (Brassicaceae) family. For those who never took Latin in school, procurrens = spreading. We grow this in a fairly dry spot in the garden where it gets 2-3 hours of sun each morning. Winter hardiness is Zone 3-8.
One of the gems from our 2012 botanizing trip to the Balkans, was a growable selection of Paris quadrifolia. For those who haven’t mastered Latin, quadrifolia means 4-leaves. All cultivated forms of this widespread European trillium relative had failed to thrive in our hot humid summers. Our collection from the Croatian town of Rude (I’m not making this up), has thrived, forming a lovely patch and even flowering. Hopefully, one day in the future, we’ll have enough to share.
After showing many of the hybrid hellebores, here’s where they started. Flowering now at JLBG is one of our Balkan collections of the stunning Helleborus multifidus ssp. hercegovinus, which we grow for the foliage. This clump was started from a single division of a special plant we found in Montenegro…just after we crossed the border from Bosnia. The small green flowers are typical for the species. This is a slow-growing, summer-dormant species, which is why your rarely see it offered. If these are growin from garden seed, you get all kinds of hybrids, but almost never any with the stunning foliage of the true species.
If you’ve never read any of our plant expedition logs, here is a link to our Balkan travels where this gem was found.