Hi Bruno,
Oh, what gorgeous plans! I love the thought of these plants growing together in your new garden. Henbane and Datura, like it shady, but need some sun. Datura likes rough exposed soil too, in fact I usually find it in open locations. As you know, both are super-poisonous, especially Datura which will give a high just by hanging out close to it, and the dose is close to the lethal dose, so watch out for any pets (who probably will leave them alone, but depends on the pet’s inquisitiveness of course) and children. I have one in my garden, as a show plant to start with, now tucked away deep in a plantbed where people can’t easily reach by accident.
Have you tried Brugmansia? That’s similar to and a sister of Datura, less toxic and not winter-hardy. It can grow tall, wide and showy with the hanging flowers – really beautiful, Druidic and magical, night time scent, gorgeous! I have that some years as a balcony pot plant.
The others on your list should do well with well drained soil, a decent amount of sun. All can be planted now, then I suggest you give each a marker and don’t cut the dead growth back much in winter, so you can see where they are. Some take a while to come back to green in Spring – Mugwort will look like it died completely and then spring back in April. I would get the plants into the soil. Most don’t like being in homes, they are dry and warm places and the plants need moisture in the air and cold periods in winter. Unless of course you have really delicate plants.
Will go through each now:
– Mugwort / wormwood –
Likes to do it’s own thing – both do. Plain soil, nothing special needed. A strong plant. Can plant now. Shade/sun. Gets tall if allowed. Wormwood is especially good to grow as it is rare here, in the wild.
– Ladys Mantle –
Prefers sunny terrace or path edge locations. Roots will rot if too wet. Mine grow in between terrace stones. I have some babies if you want some for free.
– Juniper –
Exposed location. Needs sun. Thing of exposed dunes and moorland. This plant is so strong. Not too wet soil. Mine is 17 now and still in the same pot. Better soil brings more growth. Neglected (like mine) means slower growth. I have the potted upright one and also a younger spreading one at the volkstuin. That’s growing faster as has space and soil to use.
– Chamomile –
I suggest the perennial type, German Chamomile. Easy. Loves sun, especially for flower production. Best not to disturb the soil much when it is planted and let the roots spread. Great and easy plant. Pots or soil.
– Yarrow –
Easy, doesn’t need much attention. Straight in regular soil.
– Vervain –
Lovely also. Same as Yarrow, get it in the soil, remove any weeds now and then.
– Poppy-
Lovely, annual. From seed. Just throw them around in Autumn and Spring. Don’t bury the seeds, they are blue-black and just spread around on soil surface.
Other suggestions:
Your Sweet Flag is a water loving plant (usually), so keep that in mind and it will do well.
The pot plants you have are all lovely. Most could just go into the soil but Lavender is fussy and will not do well usually in wet soil.
Elder – Vlier
Lovely and very useful shrub.
Ground ivy – Hondsdraf
Creeping ground cover loves shade and dampness.
Motherwort – Hartgespan
Perennial. Handsome plant. Easy to grow.
Nettle corner? Brandnettel
Every garden needs one 🙂
All those were used by the ancient Celts.
I hope this helps. Let us know how it goes!