Making The Interior Of A Hollow Hypertufa Sphere Plant-Safe
Does Interior Of A Sphere Need To Be Sealed For Planting?
I received an email from Michelle asking:
Thanks for all the info you provide on your website. I’m presently making a hollow hypertufa sphere. Once it is done and I’ve sealed the exterior surface, I’d like to put some soil inside and plant something. Does the interior of the sphere need to be sealed?
My reply:
Hi again Michelle:
No, you do not have to seal the interior of a sphere to plant inside of it. Please be aware however that a ‘tufa object must be completely cured before you can plant in it.
Portland cement is very alkaline and will do a very good job of killing anything you plant in your new hypertufa object. So, you have to make sure you’ve leached out the plant-killing lime completely.
Please refer to my curing instructions on this page: Curing Hypertufa & Concrete. You’ll be good to go if you follow the advice.
Good luck with your projects!
