Hardiness Scale

Hardiness Scale

Question from Shoot User

3713 1

Is there somewhere on the site that says what the H2, H3, hardiness ratings mean?

Thanks.

Posted: Friday 9th of July 2010 08:29 AM

Re: Hardiness Scale
Nicola
Hi Pauline, yes, if you login and 'edit' your 'My Garden', there are explanations for all of these hardiness codes. If you tell us about your garden conditions including your hardiness rating we will help you work out which plants suit your garden (see WHERE TO GROW on each plant page)

Here is a summary about hardiness for you: Each plant in our database comes with a rating of H1, H2, H3 and/or H4 depending on the temperture it needs to thrive.

Almost everywhere in the UK, we can grow H4-Hardy (-15C/ 5F) and Frost Hardy (-5C/23F) plants. So unless you live very far north, you should make a note that you can grow plants with an H4 rating.

If your garden is in the south and stays warmer, you can also include H3-Tender (5C/41F) and Half Hardy (0C/32F) plants. (if not, best not to add H3 to your list)

If you can grow plants in a cold greenhouse, add H2-Unheated greenhouse to your list. And finally if you have a heated greenhouse, add H1-Heated Greenhouse/Indoors.
Replied: Friday 9th of July 2010 04:57 PM