I’ve had a Hablitzia Tamnoides plant for about 18 months now. To say it is not thriving, would probably be pretty accurate. It’s a relatively unknown plant in the UK, at least until quite recently. Originating from the caucasus region, it is (supposed to be) a vigorous scrambling perennial plant, growing to about 6 ft with tasty leaves that can be cooked and eaten like spinach. Steven Barstow (http://www.edimentals.com/blog/?p=8606) has helped to popularise the plant with his ‘around the world in eighty plants’ book, which I heartily recommend by the way. My plant came from Alison Tindale of backyard larder (http://backyardlarder.co.uk), as a swap for some local Skye plants, and I planted it in the tea garden, where I thought it would be quite sheltered. As it turns out the tea garden hasn’t been as sheltered as I’d hoped. Also, I’ve since found out it’s native range is in limestone cliffs, so it prefers quite an alkaline soil.
(edit: I seem to have made up the limestone based on this comment from Steven Barstow, https://m.facebook.com/story.php?story_fbid=10154986079450860&id=655215859
I think I just assumed the cliffs in the picture were limestone. Having done some hasty research online https://www.britannica.com/place/Caucasus, does mention limestone, so perhaps my guess was right. Alison Tindale also says it dislikes acid soils (which seems to bourne out by my experience) so I think I have added 2 and 2, whether my answer is right is luck rather than judgement! What Stephen actually says in his book is that ‘It is found in spruce and beech woods, amongst rocks and in ravines and along rivers’)
It also benefits from quite a fertile spot. I don’t think the tea garden is particularly fertile, but relatively good for round here. Because I was so keen on growing this plant, I had also obtained some seed from Mandy at incredible vegetables (http://www.incrediblevegetables.co.uk) this spring, and got lots to germinate.
Potted on, they soon outgrew the fertility in their little pots and turned quite yellow. I’ve since potted them on again, and so far they are looking a bit more happy. I decided to make a ‘habby bed’ to make my hablitzia happy. This is in the shelter of the workshop by the drive. I dug out the soil and rocks as deep as I could (not very deep – a foot or before I hit bed rock). I then back filled with builder’s rubble (some of the old render from the byre which was falling off). On top of this I put compost from last year’s compost heap which was rather full of wood ash from the stove, so hopefully both nutritious and low in pH. Having mixed these two together (difficult with the stones) I topped the lot with not quite ready bracken compost, which hopefully will be relately weed free as well as adding to the nutrients in the longer term. I’ve planted three of my new hablitzia in the bed and so far they are just sitting there! Hopefully next spring I should see them putting on good growth in appreciation. I need to think about some sort of climbing frame for them, since they should now grow quite tall.
This week I finally got round to doing a pH test on the soil here. I’m not sure why I hadn’t done it before. I think I had just gone on the gut feeling that it is quite acidic, without needing to put a number on it, and let’s just say I was right! The hydrangea here can have lovely blue flowers, and rhododendron thrive. I’m a bit surprised now that anything else grows – it just goes to show that plants don’t read books! I took a soil sample from approximately the centre of the tree field between the royal oaks, and the pH came out as very acidic. I tested the soil in my happy habby bed as well, and at this early stage my terraforming has been successful as it has come out as alkakine. It will be interesting to see how this changes over time. Hopefully the lime from the render will keep the worst of the acidity away. If necessary, I have a ready supply of ash from the house fires which could be used to top up.
I think I will do some more pH testing nearer the house to see if there is a difference in the cultivated areas. They may have been ‘improved’ by previous gardeners, or from lime leaching from the buildings. I do occasionally dig up what seems to be a bit of chalk, so the land does seem to have been modified in the past. I can’t think of any other reason for rock chalk to be lying about anyway.