I'm really passionate about large-leaf plants and I'm looking to add a Gunnera manicata to my garden. However, I've heard they need damp soil or a lot of water to thrive. I'm wondering if anyone has creative ideas for keeping part of my garden damp without having to constantly water it, especially during the hot summer months. I was thinking about burying a tarp deep in the soil to retain moisture and also adding heavy mulch to limit evaporation. Any advice or techniques that could help?
3 Answers
Before you make any big changes, I suggest checking out these articles on Gunnera. They cover the potential issues with introducing it to your garden. Plus, if you’re looking for other large-leaved plants, there are some good alternatives out there. It might save you some effort regarding how to manage the conditions!
There's a tried-and-true method you could follow: dig a square hole about 1.2m on each side and 600mm deep. Line the bottom with a butyl liner to hold water about 250mm deep, allowing excess to overflow from the edges. Place slanted drain pipes in the corners for access, fill with stones, and then add your soil layers before planting the Gunnera. This way, the plant can adjust its water intake, and you just have to keep an eye on the water level in the pipes.
You should definitely look into the regulations surrounding Gunnera manicata. It's not completely banned, but you’ll want to source it from a trusted nursery. One good option is to create a bog garden by burying a tarp, which can really help with moisture retention. Just keep in mind that during extremely hot weather, you may still need to water it a little.
Thanks for the heads-up! I’ll definitely look into those alternatives.