Hebes are widespread garden plants that thrive in most temperate regions. They are evergreen ornamentals and often have variegated leaves. Summer and autumn bring blue, purple, pink, and white flowers. They are particularly well adapted to coastal settings since they are hardy and can survive salt-laden winds. They will not, however, grow in areas where the temperature is consistently below freezing.
How To Grow Blue Gem
Hebe ‘Blue Gem’ by T&M Plants

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Hebe plants should be grown in moist, well-drained, light sandy soil. Hebes should not be planted in acidic soil. Choose a location that is exposed to the sun or semi-shade and protected from high winds. After planting, make sure to water well.
Where should hebes blue gem be positioned?
The best position for this New Zealand beauty is in full or partial sun. It can also tolerate partial shade as well.
How tall does hebes blue gem grow and spread?
Hebe Blue Gem is a slow-growing evergreen shrub that looks great all year. Hebe Blue Gem can reach a height of 4.9 feet and spread more, double the height to about 9 feet. It takes between 10 and 20 years for it to reach its maximum height at maturity.
What Kind Of Soil Does It Need?
Most hebe shrubs require well-draining soil. They prefer moist soil but not wet soil. The Hebe genus does not tolerate pH extremes in the soil. Most can tolerate soil conditions ranging from slightly acidic to slightly alkaline, but neutral soil is generally preferred. 

Improving heavy soils with grit or sharp sand will help this Hebe thrive; however, this delightful, sweetly scented gem should not be placed in very wet areas.
Common Problem With Hebe Blue Gem.
If a hebe plant isn’t blooming, the most common cause is a hard prune that removes new growth and nodes. But don’t worry, the hebe will recover in a season or two and bloom again once new growth is fully established. However, if you haven’t pruned the shrub in years, that could be the source of the problem. Make a point of pruning regularly.

Where to buy Hebe Blue Gem?