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Tips on smart shopping for fall planting

Choose wisely and your garden additions will thrive

Sacramento Digs Gardening
BY Kathy Morrison PUBLISHED SEP 17, 2020

Two 'Green Beauty' boxwoods, same size pot, same size plant. But the one on the left will have an easier time getting established because the roots aren't so matted as the one on the right. (Photos: Kathy Morrison)

The weather's cooler -- hooray! -- and gardeners can return to a favorite sport: Choosing plants to add to the garden this fall.

But before rushing off to the nursery (independent or big-box), there are ways to help ensure those new plants thrive once they're brought home and transplanted.

Missy Gable, director of the statewide UC master gardener program, did a Facebook live program on this topic last year at this time, and I'm indebted to her tips, though I have plenty of my own. (You can watch her on YouTube here . ) Viewing it again recently made me nostalgic: She filmed it at the UC Davis Arboretum Teaching Nursery just before one of the big fall plant sales. Sigh.

1) Have at least a general idea of what you're looking for. Annuals or perennials, in-ground or container, full-sun exposure or full shade? Foundation plant or accent? This will help you focus when you arrive. We all get distracted by pretty plants; having a shopping list or a diagram of the planting area will keep you on task. I'm a sucker for salvia and coneflowers, but I know it, so I try to stay disciplined.

If you didn't know it was near the end of the season for vincas,

those yellow leaves would be a good signal.

2) Look for healthy plants. That means good color, strong shoots, and no sign of pests. Yellowing or wilted plants are sending out distress signals. Do not purchase them (they might be discounted) unless you're experienced at reviving perennials. Avoid sick-looking annuals at all costs. This ties into the next tip:

3) Look for season-appropriate annuals and edibles. If I have a single most important tip to share here, it's this: Just because a plant is on sale at a nursery doesn't mean it's right for our climate or the current season. Nurseries are businesses, after all. The good ones make good choices, but they don't have curators on staff to review every plant.

Just say no to Profusion zinnias in September.

Example: Profusion zinnias in hanging pots, seen this week at a big-box nursery. Nice, but it's mid-September. Do you really want to pony up for a very-short-lived spot of color? Zinnias are summer annuals. Frost kills zinnias, and they need sun, so not a good plant to bring indoors. Leave those plants alone. Go look for chrysanthemums or lantana for a burst of fall color in a hanging pot.

4) Don't forget to read the tag. This will tell you how big the plant is supposed to get, and its water and sun requirements. Also, is it an annual or perennial? I'm sometimes surprised to see a plant I'd consider a perennial labeled an annual.

Read the fine print, or look for more information via smartphone, and there's

An annual, really? This tag was on a
5-gallon pot -- awfully big to be an annual.
Turns out it's a perennial in zones 9-11.

the answer: The plant is an annual in COLD-WEATHER climates. In Northern California, depending on your elevation and numbered planting zone, it might well be a perennial.

5) Check the roots. Both Missy Gable in the video and Sacramento County master gardener Pam Bone in her various presentations stress this. Don't be afraid to gently ease the plant out of the pot to check, or even stick your fingers in the container to feel around. A plant with curling roots, particularly a woody shrub or tree, will have a much harder time getting established. It may be impossible, in fact, and the plant will die later, at some expense. Smaller shrubs or annuals can often be saved by fluffing up or cutting apart the roots that have become matted in the container. But if you have a choice, pick the plant with healthy, white, unmatted roots.

6) Once those plants are home, tend to them closely until they're in the ground (or a new pot) and established. After all, they've been getting daily water and fertilizer, what Gable call "fertigation." That goes for drought-tolerant plants, too. She has this great comment: "No plant is low-water when you first get it." If you can't get to planting immediately (I'm guilty of this), put it in a protected spot, out of direct sun, and keep it watered until you can transplant it.

If you missed my post from a few weeks ago on local online resources for fall planting, you can find it here .

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Keywords:

fall flowers nurseries fall planting gardening Sacramento roots plants trees shrubs irrigation perennials

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Garden checklist for week of Aug. 2

Get out early in the morning and monitor your garden’s moisture needs. Deep water and add temporary shade structures for plants that are feeling a little burned. In particular, protect developing peppers and eggplant.

* Put off fertilization until this heat passes; plants need to concentrate on hydration instead of growth.

* Harvest tomatoes, beans, squash, pepper and eggplants to prompt plants to keep producing. Give your plants a deep watering twice a week, more if planted in containers.

* Watch out for caterpillars and hornworms in the vegetable garden. They can strip a plant bare in one day. Pick them off plants by hand in early morning or late afternoon.

* Mulch can be your garden’s best friend – it conserves moisture while blocking out weeds. But don’t let mulch mound around stalks, stems or trunks. That can promote rot.

* Pinch off dead flowers from perennials and annuals to lengthen their summer bloom.

* Pick up after your fruit trees. Clean up debris and dropped fruit; this cuts down on insects and prevents the spread of brown rot.

* Prepare for a fall full of flowers by paying a little extra attention to your garden. Cut off spent blooms from roses, annuals and perennials. Roses will rebloom about six to eight weeks after deadheading.

* Indoors, start seedlings for fall vegetable planting, including bunching onion, cabbage, broccoli, cauliflower, kale, radicchio and lettuce.

* Sow seeds of perennials in pots for fall planting including yarrow, coneflower and salvia.

* In the garden, direct seed beets, carrots, leaf lettuce and turnips. Make sure to keep seeds and seedlings consistently moist.

* Plant potatoes.

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