To determine the bloom habit of your hydrangea, first determine the pop in of hydrangea you have.

The most common types grown in North America are:

Another determining factor forhydrangea bloomtime is the local climate.

If your hydrangea is not blooming, use the following checklist to troubleshoot and fix the cause.

Hydrangea shrub with serrated edges on veined leaves clustered on branches

The Spruce / Evgeniya Vlasova

If a hydrangea does not bloom, it could be that it is not suitable for yourhardiness zone.

Remove the coverings promptly the next morning and repeat as needed.

Locations with full afternoon sun are usually too intense.

Potted hydrangea with bright pink and white flowers clustered on wood table

The Spruce / Evgeniya Vlasova

Both too little and too much sunlight can affect blooming.

Thepanicle hydrangeacan tolerate the most sun exposure.

Timing of Pruning

When it comes to pruning hydrangeas, timing is everything.

Hydrangea shrub with large purple and blue flower clusters surrounded by leaves

The Spruce / Evgeniya Vlasova

Without knowing which hydrangea you are pruning, you risk removing the stems that will produce buds and blooms.

confirm to follow theinstructions for pruning hydrangeasaccording to key in.

High-Nitrogen Fertilizer

Whenhydrangeas are given fertilizerwith a high nitrogen content, they produce mainly foliage and no flowers.

Dried hydrangea flower clusters covered with snow on thin stems

The Spruce / Evgeniya Vlasova

What they need is afertilizer that is high in phosphorus(P) because phosphorus promotes blooming.

Hydrangeas do best insoil with an acidic pH.

you could use a fertilizer for acid-loving plants but be aware that might have a higher nitrogen content.

Hydrangea shrub with white flower clusters being pruned

The Spruce / Evgeniya Vlasova

Think back to last summer’s weather conditions to determine if this could be the cause.

To prevent this from happening again, see to it the soil is continuously moist but well-drained.

Newly Planted Hydrangea

It can take a hydrangea a couple of years to become fully established.

New hydrangea shrub planted in garden with bright green leaves

The Spruce / Evgeniya Vlasova