Stop Letting the Calendar Decide When You Plant

Why Observing Local Conditions Beats Relying on Fixed Dates

Here’s a truth that trips up many gardeners: planting decisions for perennials, shrubs, and trees shouldn’t be tied to a date on your calendar. While it’s tempting to circle a day in spring and declare it planting time, nature rarely follows our schedules. Relying on fixed dates can lead to disappointment—or even disaster—especially if you’re not tuned in to what’s actually happening in your garden and whatever the weather is doing ‘now’.

Daffodils with buds mid-February (Zone 8a, NC). Photo by Judith Paul.

Take Zone 8a in North Carolina as an example. February is still winter according to the calendar, but every year the garden starts to stir at this time. Hardy bulbs have been peeking through the soil since December, and by mid-March, early-blooming trees and shrubs are already putting on a show. Some years, spring seems to arrive overnight; in others, it lingers just out of reach for a few more weeks but always before the end of February. If you’re waiting for a “safe” date, you might miss out on key planting opportunities—or worse, plant at the wrong time for that year’s local conditions.

Blooms on Spiraea thunbergii ‘Fujino Pink’ mid-February (Zone 8a, NC). Photo by Judith Paul.

Many gardeners believe it’s best to plant only after a certain date, thinking this guarantees success. It’s common for customers to visit me around this time, because it’s a “good time” to plant something like a Euonymus hedge. However, this approach is misguided because the exact same plants have spent the winter in above-ground containers in my backyard instead of in the ground in their yard. If those plants can survive the winter in containers in my yard, they’ll do a lot better in the ground in the customer’s yard!

Any time you can turn the soil is a good time to plant. Photo by Debbie Hudson.

Waiting until a fixed date doesn’t actually make planting safer. In fact, it usually means more work throughout the summer, because new plantings need extra attention and watering during the hottest months. Locally, we can move from spring conditions to summer conditions in the blink of an eye. I have learnt that “spring” in NC is a concept rather than a climate reality.

Diligent watering for newly planted gardens over summer is critical! Photo by Centre for Ageing.

Additionally, buying and planting in spring often costs more, since demand is higher. By waiting, gardeners also lose out on valuable months of root growth that would have occurred if the plants had been in the ground earlier. New spring growth is often less vigorous due to transplant stress, as well as being more susceptible to plant pathogens and insect damage. Still, many people stick to the tradition of waiting until some random date in March, April, or May simply because that’s what they’ve been told.

The key is to use your senses, not just your calendar. Each year, signs of spring—like swelling buds, emerging shoots, and warming soil—can appear at different times. Weather patterns shift, and what worked last year may not be right this year. Adapting to these changes helps your garden thrive and keeps you from making avoidable mistakes. 

For example, this year, I’m looking forward to getting some rooted rose cuttings outside to acclimate. Normally, that would happen in mid-February, but this year we had a snowy weather event at the beginning of February, with quite a few temperatures below freezing forecast to occur throughout the rest of the month. So, instead of going outside in the middle of February, these rose ‘babies’ probably won’t start their transition to the big outside world until the end of February and will probably not complete it until late March. 

Rosa ‘Peggy Martin’ – not quite established enough for going outside in mid-Feb. Photo by Judith .Paul

One of the best ways to play it safe is to plant in fall. Yep, fall!

Fall is best, roots cozy and tight,

Winter is good if your plants are hardy and right.

Spring runs third, not quite the star,

Summer’s last—plant killer, by far!

One common pitfall is spotting an early arrival at a garden center that is in full bloom and looks gorgeous. I totally understand the temptation. You have cabin fever, are itching to get out in the garden, and have a few places that need a plant. I remember this happening with some Lily of the Valley (Pieris) shrubs several years ago. These were beautiful plants in full bloom, available in early March in Zone 8a, North Carolina. They sold like hot cakes, but I bet very few of them survived. Why? Because the same plant in my garden starts to bloom in mid-April, six weeks after these ‘imported’ plants. That’s when local conditions triggered blooming, not a greenhouse schedule to get prime plants to market as soon as possible. 

That year, we had a late dumping of snow in very early May. Although the blooms on my plant were knocked back, the plant itself shrugged it off and carried on because it was an established, in-ground plant. The ‘imported’ plants were unlikely to cope as well because they were being planted in full bloom and at the wrong time, even though it was “spring”. Timing is everything, and nature’s signals are more reliable than a date circled in pen on a calendar. Planting in the fall gives plants a chance to acclimate to local conditions. Local conditions for a plant grown in a Florida greenhouse or Californian nursery are totally different from in-ground conditions in North Carolina!

New growth on Hellebores in mid-February. They should have been planted in the fall! Photo by Judith Paul.

Frost-tender annuals (which include a lot of vegetables) are a different story. The schedule for their planting quite rightly needs to be timed for after the last frost date. That date can be ascertained from many reliable sources, including internet searches. Perennials, shrubs, and trees are a different story altogether and can be planted year-round (with summer being the least desirable). In fact, these types of plants benefit from being in the ground well before spring’s full arrival. Planting before spring growth is triggered by warmth and longer days lets roots settle in and start supporting the plant while conditions are cool and moist. The plant does not have to cope with rooting in at the same time as leafing out or flowering, and will be a happier, healthier plant because of this.

Roots don’t establish overnight. After planting, it can take months—or even years—for roots to fully penetrate the surrounding soil and anchor the plant. As long as the ground is workable, the more time you give your green friends to settle in, the better adapted and more resilient they will be when real growth begins.

So, forget about sticking to a rigid schedule determined by a calendar. Watch your garden, pay attention to local cues, and let your plants—and the weather—be your guides. With a little flexibility and observation, you’ll save money (and plants!), make wiser planting decisions, and enjoy a more vibrant garden that grows vigorously all year long.

Observation of local conditions and local forecasts are more relevant planning tools for planting than some random date on a calendar. Photo by Roberto Shumski.

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Article by Judith Paul

Hi, I'm Judith Paul, with a gardening style best described as “Oooo, there’s a gap over here!” My work history is equally unpredictable (possibly even quirky) and ranges from pulling eel-infested cow carcasses out of creeks to managing multi-million-dollar projects across various industries. I’m a Kiwi (referring to the iconic flightless bird of NZ, not the fruit) who has also lived in Australia. Currently, I run a licensed and inspected plant propagation nursery in North Carolina (USA) when I’m not teaching, writing, or editing.

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