I have a couple of young plants which are quite spindly but now have the secondary leaves. As they are still quite small, could you give me any tips for care over the colder months? I am concerned because they are young, but they may well be more robust than they seem! Many thanks
The recommendation is to just let the leaves die down for winter protection of these leafy perennials.
Since you mention they are small with not much structure, adding 4 to 5 inches of organic mulching material will help.
Leaves will work for this.
Is Brunnera foliage attractive after flowering? Will I need to plan surrounding foliage?
Brunnera has a beautiful foliage.
I would like to buy and plant Brunnera macrophylla, but Mm question is, when to do it. Now or in the spring? Thanx, Daniela
You can plant Brunnera in spring or fall. Water well to get the new plants established.
Here is a link with more information
Should Brunnera (Jack Frost) be cut back in fall? Should I cut it back before frost?
You can trim away any ragged parts of the plant in fall.
Winter mulch is recommended. Cutting the plant back in the spring is better as leaving the leaves on to protect the crown through winter will give better results.
How do I care of a variegated Brunnera?
This article should help
May I transplant Brunnera "Jack Frost" in the fall? It had too much sun where I planted it last spring. I live in Massachusetts, zip 02043.
I would usually recommend planting these in spring for the best results. If you plant now, you may lose some or all of them, however some will likely survive. To give them the best chance they should be propagated in spring. Here is an article for more information about these plants: https://www.gardeningknowhow.com/ornamental/flowers/brunnera/growing-brunnera-plants.htm
I have a Jack Frost Brunnera that has gone brown and collapsed. A few healthy leaves remain. Nearby Brunnera look fine. Should I dig up and replace with something else? Or will it come back next year?
This appears to be a fungal infection. I can see signs of it on all of the plants in that picture.
You will need to treat with a fungicide. This article will help:
Make sure to allow the soil to dry out down to about 1 inch between watering. Any drier will be bad, as well as leaving the soil wet. You may find that the moisture needs of this plant will not be the same as the surrounding plants. They will likely stay infected, which will keep the Brunnera in a diseased state.
Here is an article that will help you to measure soil moisture:
Here is an article that will help you with the care of the plant: