Q.I Have 4 Hebe Frozen Flame Shrubs. They Have Spread And Got Very Twiggy In Middle.can I Tie Them Up So They Are Taller And Not Sho
w bare twiggy centres? They are not very attractive like this.

Certified GKH Gardening Expert
It would seem that the neighboring plants have stretched, as well! This will indicate that the area does not receive quite enough light, or could mean that the area remains too moist. Usually, it is more of a response to a lack of light.
If it is not possible to provide extra light to the area, then it may be necessary to find plants for the area that can handle a shaded area.It is not a good idea to tie them up, together, since that can be the perfect breeding grounds for bad microbes.
Here is an article that will help you to know what this shrub requires:
https://www.gardeningknowhow.com/ornamental/shrubs/hebe/hebe-shrubs.htm
Here is a collection of articles to offer suggestions for shade plants, or partial shade plants:
https://www.gardeningknowhow.com/garden-how-to/info/partial-shade.htm