Posts Tagged ‘spring flowers’

When to Plant Bulbs in Fall

Though they bloom in spring, flower bulbs that are planted in fall are known as “fall bulbs”. Popular spring-flowering plants like daffodils, tulips, crocus, and hyacinth are fall bulbs. Allium, scilla, anemones, and Asiatic lilies are planted in fall too. With a seasonal range of three months, when to plant fall bulbs is a question many gardeners struggle with.

Daffodils are a welcome sign of spring

Daffodils are a welcome sign of spring

Timely fall planting allows roots to develop before the ground freezes and prepares the plant for quick spring growth and flowering. If you plant too early the bulbs may use critical energy reserves and can begin to send up new shoots, exposing the young growth to winter kill. Prolonged exposure to warm, moist soil may promote fungal problems and rot. Plant too late and root growth may not be enough for the plant to flower properly.

To flower in spring, fall bulbs require exposure to cold temperatures. This chilling period triggers them to break dormancy when temperatures warm in spring. It’s all about planting early and warm enough for the bulbs to begin developing, but late enough for them to stop developing shortly after to start soaking in the cold.

Tulips need to be planted in fall

Tulips need to be planted in fall

There is no single right time for all gardeners. The proper time for planting fall bulbs may be September in Wyoming or North Dakota, October in Colorado or Kansas, November in Oregon or Nevada, and December in Virginia or North Carolina. Gardeners need to find out what’s right for their individual gardens; one-size-fits-all advice from gardening books or magazines may lead to incorrect guidance.

Cooler soil temperatures are a primary indicator for proper planting time.  Ideally, soil temperature needs to be below 60F; a temperature of 55F degrees is perfect. The problem for the average gardener is that few gardens come with soil thermometers. As a guideline, soil temperatures usually cool to this target after a few weeks of nighttime temperatures regularly between 40 and 50.

There are also natural indicators that some gardeners use:

Plant just after fall foliage peaks
Plant when you no longer hear crickets at night
Plant when you see flocks of birds heading south
Plant when you regularly need a jacket to work in your garden
Plant the week after you smell your neighbor’s fireplace for the first time
Plant when you have to turn your car heater on in the morning
Plant when your dog moves from the shade to the sun
Plant when your grapes are ripe
Plant on Columbus Day, Halloween, Veteran’s Day, or Thanksgiving (depending on your zone)
Plant garlic on the first day of school
Plant after you blow out your lawn sprinklers

These suggestions are very unscientific and rely on local conditions that may not match your climate. But if you find a natural indicator that works for you, use it.

Some gardening experts recommend planting bulbs six weeks before a hard, ground-freezing frost. That’s a little too hard to predict for many regions. If unseasonal warm weather lingers, bulbs may end up waiting in the ground for the cold to arrive for two months or more. That’s much too early.

Planting within a few days of your average first frost date is a good guideline. That’s what I typically use. The average first frost date means that historically half of first frosts occur before that date and half occur after. For me, that’s the first week of October. By that time cool nights have cooled the soil but there are still enough warm days ahead to keep the soil warm enough for root development.

Irises aren't true bulbs and do best when planted in late summer or early fall

Irises aren’t true bulbs and do best when planted in late summer or early fall

Check with local gardening experts for recommendations on planting fall bulbs. Diane Brunjes, Certified Colorado Gardener and the gardener for the Horticultural Art Society of Colorado Springs, recommends October planting versus September for our area too. In our climate, “It’s too warm early in the season,” she says. She’s right.

A little too late is usually better than a little too early. There is a four to six-week target window for planting bulbs, but as long as you can still work in the soil it’s probably not too late. Crocus, scilla, and snow drops do better planted earlier. Daffodils, hyacinth, and tulips can handle late planting. In fact, tulips can be planted in frozen ground and will probably still do fine.

If you miss the ideal planting time and still have bulbs you purchased, plant them anyway. Most bulbs will dry out and be worthless if left to sit in their bag over the winter. They stand a chance of growing while in the ground. Plant them and hope for the best; you may be surprised by the results.

If you’re still wondering when to plant your bulbs take a look around your garden. When you walk outside at night are you cold without a jacket? Have your pepper and tomato plants withered from frost? Are your raspberries fruiting? Are mum flowers drying on the plant? These are all signs that the season is changing and winter is coming. Don’t delay too long. It may be the perfect time to put those bulbs in the ground.


A Gardener’s Equinox and Equilux

Forget March 20th, today is my spring, or vernal, equinox. More accurately it’s my vernal “equilux”. On the equilux, day equals night, sunrise and sunset are exactly 12 hours apart. Technically the equinox is the point in time when the sun is directly above the equator. It’s commonly associated with the solstice and we recognize the day as the beginning of spring; on the calendar that will be March 20. Specific equiluxes around the world vary from that day depending on latitude.

Daffodils and tulips will be here soon

While many gardeners look forward to the equinox or solstice or beginning of spring as a transition day, to me the equilux is more exciting.  This is the day I’ve been looking for as I note the sunrise and sunset times in the local paper. I don’t have to wait four more days to celebrate the season. Starting tomorrow the sun stays up longer each day. The soil will warm, the buds will break, green will pop forth throughout the landscape. Spring is definitely in the air.

Life has begun and will continue to explode around me. It’s a tad ironic that the day began with a woodpecker tap-tapping on the outside wall above our headboard.

The thought that for the next six months I’ll have more time to enjoy the sun is warming. I love gardening throughout the year, but I tend to like it more when I don’t have to put a coat on. A hot sun and warm soil work well together. Symbolically, today is when it begins to happen for me.

There will be more time for gardening each day. More time to get my fingers dirty. More time to sow, plant, water, weed, prune, and harvest. More time to do what I love to do.

Mentally a threshold has been crossed. The chains of winter have been broken. My equilux is today and my growing season begins. Warm and productive days await. It helps that we’re expected to set a record high temperature this afternoon.

I’m headed outside to do some of the garden clean up that seemed like a chore when the skies were grey and the wind was chilled. Now the same task seems more like easy preparation for the seeds and transplants that will follow soon.

I’m enthusiastic. There is so much to do and already there doesn’t seem to be enough time to get everything done. But I’m more than willing to make it all happen and enjoy myself in the process. What a difference a day makes.