Panicle hydrangea 'Bobo'

Questions about panicle hydrangea 'Bobo'

Does panicle hydrangea 'Bobo' need sun or shade?

Panicle hydrangea 'Bobo' grows in full sun (6 or more hours of direct sun a day) and part sun (4 to 6 hours of sun, including some afternoon sun).

It wants soil that stays evenly moist, of average fertility, and a good soak in dry spells.

What zones does panicle hydrangea 'Bobo' grow in?

USDA zones 3 to 8. It is hardy to zone 3, which means it survives winter nights down to about −30 °F (−34 °C).

Above zone 8 it struggles: the zones measure winter cold, but a plant's top zone usually means the summers are too hot or the winters too mild for it to rest.

Gardening in Canada? Use the USDA zone for your town: Canada's own zone map uses different numbers.

When does panicle hydrangea 'Bobo' flower in my zone?

In zone 5 it flowers mid July to mid September. As a summer flower it moves about half a week for every zone: earlier where it is warmer.

Worked out from Hopkins' bioclimatic law: spring arrives about four days later for each degree of latitude north, and one zone is roughly two degrees. A warm spring or a cold one moves any garden two weeks either way.

How far apart should panicle hydrangea 'Bobo' be planted?

3 ft (90 cm) apart, from the middle of one plant to the middle of the next. That is a little closer than its full width of 3½ ft (100 cm), so a group knits into one patch.

It grows 3 ft (90 cm) tall. Give it the full distance from anything taller, or it will lean out towards the light.

How many panicle hydrangea 'Bobo' plants do I need?

At 3 ft apart, set out in staggered rows:

• 1 to fill 10 square feet (about 1 m²)
• 4 for a single row 10 ft (3 m) long
• 4 to fill a 4 × 8 ft bed on its own

In a mixed border, plant it as one, planted singly: it is the bed's structure, and everything else is arranged around it.

In the bed above, the planner used one in one group.

Is panicle hydrangea 'Bobo' poisonous to dogs and cats?

Yes: mild toxicity to people, dogs, cats and horses. Leaves and buds can cause vomiting and diarrhoea if eaten.

Rated from NC State Extension. Where references disagree, the more cautious rating is used.

Is there a pet-safe plant like panicle hydrangea 'Bobo'?

These come closest to doing what panicle hydrangea 'Bobo' does, and no toxicity is recorded for them:

• Summersweet 'Hummingbird': the same job in a bed, the same size and the same colour; flowers mid July to mid August.
• Shrubby cinquefoil: the same job in a bed, the same size and the same colour; flowers early June to mid September, fine leaves, not medium.
• Dwarf fothergilla: the same job in a bed, the same size and the same colour; flowers late April to mid May.

Matched the way the planner's Swap button matches plants: the same job in a bed, then size, then flowering time.

Do deer eat panicle hydrangea 'Bobo'?

They may. NC State does not list it as resistant to deer or rabbits. Where they visit, protect it, or plant it among ones they avoid.

What flowers after panicle hydrangea 'Bobo'?

Panicle hydrangea 'Bobo' is over by mid September. These start as it finishes and carry the same spot on, so it never goes flat:

• Garden chrysanthemum: from mid September to late October, 24 in tall, to stand in front of it and cover its fading stems.
• Blue wood aster: from mid September to mid October, 3 ft tall.
• Montauk daisy: from mid September to late October, 3 ft tall.

What does panicle hydrangea 'Bobo' look like in winter?

Panicle hydrangea 'Bobo' drops its leaves and stands as bare branches. That is when to see its shape, and to prune it if it needs pruning.

Is panicle hydrangea 'Bobo' good for bees and butterflies?

Panicle hydrangea 'Bobo' is visited by pollinators.