What's Blooming in My Zone 9 Garden This May
What's Blooming in My Zone 9 Garden Right Now
May garden jobs, what I'm tending to, and the gorgeous show happening outside my door right now
May in a Zone 9 garden is one of those months that makes every hour of hard work feel worth it. The garden isn't waking up anymore — it's fully, gloriously awake, and it demands attention in the best way.
This is the sweet spot between spring's gentle warmth and summer's intensity. The mornings are still cool enough to work comfortably, but the temperatures are climbing fast. Out in the garden right now, I have more color happening than at almost any other point in the year — salvias at full height, roses putting out repeat flushes, hibiscus opening its huge tropical blooms, and the petunias and veronicas I planted a few weeks ago have settled right in and started performing.
Let me take you through what's blooming right now and what I'm doing to keep the garden thriving as we head into the heat of summer.
What's Blooming Now
The salvias are absolutely magnificent right now. The tall Mexican sages are sending up their velvety purple spikes, while the lower-growing varieties are covered in a carpet of color. Hummingbirds visit constantly.
🌿 Hummingbird MagnetThe second flush is in full swing. The David Austins are doing what they do best — fat, fragrant, quartered blooms that stop you in your tracks. The climbers on the wall are covered in buds.
🌹 Repeat BloomerThe tropical hibiscus is exploding. Each bloom lasts only a day but the plant is producing so many buds it doesn't matter — there's always a fresh, stunning flower to greet the morning.
🌺 Daily BloomerThe mopheads are showing their first color — big soft globes of blue and pink depending on soil pH. I've been making sure to keep the soil evenly moist since hydrangeas really struggle if they dry out in warm weather.
💧 Moisture LoverThese are the workhorses of my containers and borders right now. Supertunia varieties bloom continuously without deadheading and they're trailing beautifully over the edges of my raised beds.
🌸 No-Deadhead NeededThe verbenas have filled in beautifully and are covered in their tiny clustered flowers in rich purples and magentas. Heat tolerant and vigorous — perfect for Zone 9 summers ahead.
🔆 Heat TolerantThe zonal geraniums in pots are a riot of red, coral, and pink. They love the warming temperatures and are putting out fresh flower heads on strong stems. Easy, reliable, and beautiful.
🏺 Container StarThe scented-leaf and ivy pelargoniums are trailing and climbing in the most charming way. The ivy types cascade over stone walls beautifully, and the scented varieties release fragrance every time the foliage brushes against something.
🌿 Fragrant FoliageMy May Garden To-Do List
Deep-Water Before the Heat Arrives
May is the last comfortable window to really establish deep watering habits before Zone 9 summer kicks in. I'm making sure every plant — especially newly planted summer annuals and the roses — gets a deep, slow drink that reaches down 8–10 inches into the soil rather than a quick surface sprinkle.
Deadheading Roses Regularly
For repeat-blooming roses, deadheading is essential right now. As each bloom finishes, I cut it back to the first 5-leaflet set below the flower. This signals the plant to produce another flush of blooms rather than directing energy into hip development. In May, this can mean a new flush in as little as 4–6 weeks.
Fertilizing Summer Bloomers
May is the time to give the heavy feeders a good boost. The hibiscus, geraniums, petunias, and verbenas all benefit from a balanced liquid fertilizer right now, as they're in active growth mode. For the roses I use a slow-release granular rose fertilizer applied every 6–8 weeks through the season.
Checking the Drip System
Before summer heat arrives in earnest, I walk the entire drip system and check every emitter by hand. Clogged emitters are silent killers — the plant looks watered but the soil directly at the root zone is bone dry. I also adjust emitter output for plants that have grown significantly since last season. (See my full irrigation post for details!)
Mulching Every Bed
If you haven't mulched yet, May is your last good window before summer soil temperatures spike. I put down 3–4 inches of wood chip mulch around everything — roses, hydrangeas, perennials, shrubs. It conserves moisture, regulates soil temperature, and suppresses weeds all season long. Worth every bit of effort.
Training Climbers Before Growth Hardens
May is perfect for training climbing roses and jasmine before the new growth hardens into woody canes. I use soft garden twine to gently tie new canes to their support structures, training them horizontally when possible — horizontal canes produce the most bloom laterally, which means more flowers per cane.
Want the Full Zone 9 Seasonal Guide?
My printable Zone 9 monthly garden guides walk you through what to plant, what to prune, and what to watch for — every month of the year.
Find It in The Garden Scroll Shop →May is fleeting and I'm trying to savor every morning in the garden while the weather cooperates. There's something deeply satisfying about watching a garden you've tended through the quiet of winter suddenly burst into this kind of generous, exuberant bloom.
I hope your garden is giving you the same joy this month. What's blooming for you right now? I'd love to know. 🌿
— From my garden to yours
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