What to Do With Hydrangeas in April for Fuller Flowers – and the Simple Mistake That Could Cost You a Summer of Blooms
Doing less in April is the secret to getting more flowers in summer
Doing the wrong thing to your hydrangea in April can undo an entire summer of flowers. As the plant wakes from dormancy and fresh green growth begins to push through, this is the moment many gardeners instinctively prune. But with hydrangeas, what you do in April will directly determine whether you get a full, generous display of blooms or a sparse, disappointing shrub later in the season.
The key lies in understanding that not all hydrangeas behave the same way. Some bloom on last year’s wood, others on new growth, and in April, that difference becomes critical. Get it wrong now, and you risk cutting off the season’s flowers before they’ve even formed. Here's what to do with hydrangeas in April.
1. Identify What Type of Hydrangea You Have
An oakleaf hydrangea (pictured) flowers on old wood and should not be pruned in April.
Before you touch a single stem, it is essential to know exactly what you are working with. As Drew Swainston, Gardener and Garden Writer at Homes & Gardens, explains: ‘Hydrangea pruning is entirely dependent on whether the plant flowers on old or new wood – get this wrong, and you can lose an entire season of blooms.’
Article continues belowMophead, lacecap, and oakleaf hydrangeas generally flower on old wood, meaning their buds are already set on last year’s stems. Panicle and smooth hydrangeas, on the other hand, produce flowers on fresh, new growth each year.
This single distinction determines everything that follows. If you are unsure, it is always safer to assume your plant flowers on old wood and prune lightly, if at all.
2. Remove Old Flower Heads Carefully
April is the ideal time to deadhead hydrangeas, but it should be done with care and restraint.
If dried flower heads are still clinging to the plant from winter, April is your final opportunity to deadhead hydrangeas – but it should be done with real restraint. Cut just above a strong pair of healthy buds, taking care not to remove any of the surrounding new growth that may already be forming beneath.
This is not a reshaping exercise. It is simply about clearing last season’s remains while protecting the buds that are already preparing for summer’s display.
Use sharp, clean pruning shears – such as these Fiskars bypass pruning shears available on Amazon – to make precise cuts back to a strong pair of buds, ensuring clean wounds that support healthy regrowth.
3. Cut Out Only Dead or Damaged Stems
Once spent blooms have been removed, focus on any growth that is clearly dead or no longer viable. Frost-damaged tips, brittle brown stems, and weak, congested growth in the centre of the plant can all be cut away.
The emphasis here should be on precision, not enthusiasm. Every cut should improve airflow and overall plant health without changing the natural shape or structure of the shrub.
4. Feed and Mulch to Support New Growth
With pruning kept to a minimum, April becomes a month for nourishment and steady support. It is also the ideal time to fertilize hydrangeas, using a balanced feed designed for flowering shrubs to encourage strong bud development and healthy growth. This Hydrangea Fertilizer Liquid is a best-selling option on Amazon.
A layer of mulch around the base will further help to retain moisture and regulate soil temperature as growth accelerates. This quiet, consistent care often has a greater impact on summer flowering than pruning ever will.
5. Only Prune Hard If Your Hydrangea Blooms on New Wood
‘Annabelle’ hydrangeas are a notable exception to the rule and respond well to a harder prune in April.
If you have panicle hydrangeas or smooth hydrangeas such as ‘Annabelle’, April is the exception to the rule when it comes to when to prune hydrangeas. These varieties respond well to a more confident cut back, which encourages strong new stems capable of supporting large, heavy flower heads later in the season.
Even so, the aim is controlled structure rather than aggressive reduction, shaping the plant to improve strength and flowering performance without overworking it.
You can purchase an ‘Annabelle’ hydrangea as a starter plant from Nature Hills – one of my favorite hydrangeas for its generous, oversized blooms and reliable response to a harder spring prune.
What Not to Do in April
The most important rule for hydrangea care this month is simple: avoid heavy pruning unless you are completely certain your plant will tolerate it. Cutting back mophead, lacecap, or oakleaf hydrangeas in April can easily remove the buds already set for this summer’s flowers, leaving you with foliage but no blooms.
Shop Hydrangea April Care Essentials
This liquid feed is a specially formulated blend designed to support healthy hydrangea growth and encourage abundant flowering. Simply dilute with water and apply to the soil to deliver targeted nourishment right where the plant needs it most.
These floral gardening gloves feature leather-reinforced palms and fingers, offering durable protection when working with woody shrubs such as hydrangeas. Practical yet refined, they provide a secure grip and help shield your hands from thorns, rough stems, and repetitive pruning tasks.
These bypass pruning shears are designed for confident, clean cutting, easily handling stems up to 1 inch in diameter. The razor-sharp stainless steel blades glide through growth with precision, making light work of spring pruning while helping to keep plants healthy and well-shaped.
If there is one principle to carry through April, it is this: restraint is what guarantees results. Doing less to your hydrangea now will almost always mean more flowers in summer.
Handled correctly, this is a month of subtle intervention rather than dramatic change – a light tidy, careful feeding, and the discipline to leave healthy growth undisturbed. In return, hydrangeas reward you with their signature midsummer abundance: full, cloud-like blooms that feel effortless, even if the patience required to achieve them is anything but.
