Central Sierra: El Dorado County | Master Gardener | Gardening Articles

The versatile loofah (or luffa) is edible, but famous as a natural sponge  

Luffa, often spelled loofah, Luffa aegyptiaca, is a vining gourd in the cucumber family. It can be used as a vegetable when it is young and the cucumber-like fruit is only six inches or less. It is rich in nutrients and high in fiber, often used in stir-fries and other Asian cuisine. Once it has matured, it dries into a fibrous, stringy interior, and is then used as a biodegradable sponge for the kitchen or bath.

Seeds can be started indoors four to eight weeks prior to last frost. Luffa has a long growing season of 100 to 180 days. For best results, soak seeds for 24 hours to help with germination. Seeds need consistent warmth to germinate, between 75-90 degrees F. A heat mat works well for this. Seeds can also be direct sown in warm soil, usually around mid-May in many areas. You should start your seeds indoors soon for harvest in September. 

Once the danger of frost has passed, seedlings can be hardened off by leaving them outdoors for several hours each day. 

The tricks for planting and growing luffa

Plant luffa in well drained fertile soil rich in organic matter. Ideal soil is neutral to slightly alkaline with high moisture and good drainage. Keep soil consistently moist but not soggy. Approximately five gallons of water per plant per week is a good guide. Fertilize using balanced fertilizer when flowers appear, as you would with cucumbers. 

Small seedlings grow slowly, while the roots become strong, and luffas prefer warm dry climates. Luffa grows best in full sun; plants produce flowers in two months after planting. Flowers are bright yellow.

Pruning is a must to keep the vines healthy. The vines will grow everywhere if not kept under control. If grown in optimal conditions, gardeners may get between 10-40 gourds per plant! Each luffa can produce between 100-300 seeds on average. However, for every three seeds you plant, only two will grow, even for professional growers. You can grow luffa in a 25-to-30-gallon pot or large grow bag with a trellis of some sort to support growth. 

Harvesting for sponges is the fun part 

Harvesting luffa for sponges is the fun rewarding part of growing this plant. Gourds should be ready to harvest in the fall. To use as kitchen or bath sponges, the luffa should be dried out, be yellow to brown in color, and light weight. If you shake them, you can hear the seeds rattling inside. You can shake out any seeds to keep for your spring planting and share some with friends.

If it is close to fall frosts, you can harvest them and allow them to dry inside your home, just watch for signs of mold.  Peel off the outer brittle brown skin, revealing fibrous, spongy material inside. Rinse and wash the luffa then let it dry completely, then cut the luffa into your desired sizes. Use your sponges as cleaning tools, and of course for your relaxing baths. Happy Planting!

This article by UC Master Gardener Judy Hobbs originally appeared in a March 2026 issue of the Mountain Democrat. 

If you would like to discuss luffas or any other plant in your home garden, you can Ask a Master Gardener for help. Submit your question through our online survey tool. 

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Technology for the Home Gardener 

Technology can help the home gardener in myriad ways. Technology applies scientific knowledge for practical purposes to solve problems and make life better. Technology is a tool for the garden and gardeners. We can use it to complete routine tasks or tackle more complicated matters, all in an effort to accomplish our gardening goals. 

Technology for the garden much of the time comes in the form of an app, short for computer application, which is software designed to perform specific functions. Apps are downloaded to computers and other electronic devices. Many apps use artificial intelligence (AI), a system that performs tasks without significant human effort or oversight. 

Smart weather stations give us timely, detailed information about our weather by tracking temperature, barometric pressure, wind strength and direction, rainfall, and UV rays. Originally, SMART stood for Self-Monitoring, Analysis and Reporting Technology, but today SMART is also a broad range of intelligence and advanced technology.  

A comprehensive smart garden integrates technology to streamline gardening processes to make them more efficient and sustainable. 

There are solar-powered smart irrigation systems that utilize our garden’s current weather data, using past microclimate temperatures and humidity. There are weather-based sensors that can help us apply proper irrigation to prevent over- and under-watering. The sensors are automated and can be adjusted for a plant’s age, the current weather and the condition of the soil. There is an app that tracks sunlight. 

Healthy garden soil is essential and there is technology that can determine soil texture. With that information, we can learn about our soil’s water drainage and retention, workability, and nutrient retention. Also available are soil monitors that can measure soil moisture content, pH, temperature, and natural nutrients. 

With a detection app, we can know when a critter visits our garden. Early detection may prevent damage. There are apps to determine whether it is a pest or a beneficial. If it is a pest, we can utilize a pest management app and / or visit the UC Master Gardeners of El Dorado County website to learn about research-based management, control, and treatment for natural solutions to create a more sustainable garden. 

There are many plant recognition apps that operate from our photos of a plant’s leaf or flower or a succulent, cactus, or mushroom. Utilizing again our own photos, there are apps to identify and diagnose plant needs, problems, and diseases. 

Living in the foothills, we might want to use an app that will alert us of an upcoming temperature drop. We can plan our garden with a planning app to place the right plant in the right place, that will strengthen the likelihood of a thriving garden. There is technology for all facets of composting. Robots can assist in producing and weeding vegetable gardens and can mow our lawn. 

We would be wise to use the tools of technology that were developed specifically to help us have beautiful and healthy gardens.  

This article, written by UC Master Gardener of El Dorado County Kit Smith, originally appeared in the February, 2026 issue of Around Here Magazine. 

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An Invitation to Garden Beauty: A Rose Pruning Primer  

It’s that pruning time of year! The period from Christmas until early March (depending on elevation) is the best time to get started. Your bushes will look more attractive and produce larger flowers with good pruning, and you can shape them to the proper size for your garden. The removal of dead and diseased canes also improves rose bush health by stimulating the production of new growth with the emergence of vigorous new canes from its base. Even if your bushes still have leaves and flowers, their removal now is a chance to wipe away last year’s problems and set a new path for the coming season.

The best tools required for rose pruning 

Use sharp bypass hand pruners for most cuts, and long-handled bypass loppers for thicker canes and hard-to-reach places. A fine-toothed curved saw will remove the thickest canes. A pair of leather gloves reaching to the elbows protects from thorn pricks.

The parts of the rose that should be pruned away 

Completely remove all dead canes (grayish or brown in color and shriveled looking) and canes that have been less productive with a clean cut close to where they emerge from the crown at the base of the bush. Completely remove diseased and damaged canes or cut them back to healthy wood at least one inch below the affected area so the inner wood (pith) is white. Remove all suckers coming from the root stock beneath the bush. Select the strongest three to six outer canes (smooth and green or bronze in color) to become the foundation for next year’s growth. They will ideally be arranged in a vase-like shape around the open center of the bush when pruning is finished. 

Remove with a clean cut at the parent stem any growth that is smaller than a pencil and which crosses or rubs other growth. Direct new growth away from the center by making cuts at a 45-degree angle, one-quarter inch above a bud that faces upward and to the outside of the bush. Buds can be found at leaf attachments; some will look like red dots or green smiles, while others might already be pushing leaf growth out. Remove all growth headed toward the plant’s center to discourage fungal diseases by improving sunlight access and air flow. Shorten the remaining canes on established hybrid tea, floribunda, and grandiflora varieties by one-third to one-half in length. Shrub and English roses should be given a lighter pruning, with 6-8 healthy canes left on the bush.

Post-pruning tasks for healthy, beautiful roses

After pruning, remove and dispose of all remaining leaves, along with pruned cuttings, fallen leaves, and debris collected from under the bush – no composting. Make a heavy application of dormant spray or horticultural oil on a day where there is no wind and there will be no wet weather for at least 24 hours. Thoroughly spray the bush and the ground beneath it to suffocate any remaining insect eggs or fungal spores. Apply a layer of mulch 2-3 inches deep, pulled away from the base of the plant. Fertilize about four weeks after pruning; water deeply after application. 

Enjoy a wonderful rose year!

Have a rose pruning question? Ask a Master Gardener in El Dorado County by clicking the button to our information survey below or call 530-621-5512 and leave us a message. A volunteer will get back to you during our office hours. 

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This article, written by Donna Marshall, UC Master Gardener of El Dorado County, originally appeared in the Mountain Democrat in January 2026. 

What is the Winter Sowing method of seed starting?  

An effective, simple, and low-cost seed starting method, Winter Sowing is the process of starting seeds in containers outside during the winter months. Planting seeds in clear or translucent containers, such as milk jugs, creates a greenhouse effect, trapping heat and moisture, thus allowing the seeds to naturally stratify in the winter environment. As temperatures fluctuate, seeds are protected from the harsh winter elements and are exposed to natural freeze-thaw cycles. This exposure hardens the seeds and results in sturdy seedlings that are already acclimated to outdoor conditions.

What equipment is needed to start seeds when Winter Sowing?  

• Recycled, clean and well-rinsed milk jugs (Using jugs and bottles, salad containers, or storage totes have also been used with success)
• Sharp scissors
• Exacto knife
• Plant labels
• Weather resistant marker
• Duct tape
• Seeds suited to winter sowing

Step One: Prepare the jugs for seed starting 

Cut the container horizontally in half about four inches up from the bottom leaving a small hinge to allow for easy opening and closing. The small area of plastic directly below the handle is a great location for the hinge.

Make four to six holes in the bottom of the jug with a sharp knife or screwdriver to allow for drainage. This is essential as the jugs are open to the elements and this allows moisture to freely drain out of the bottom.

Fill the bottom four inches of the jug with a quality potting mix that has been moistened. The soil should hold its shape when squeezed.

Step Two: Choose suitable seeds for Winter Sowing 

Not all seeds are suitable for this seed starting method. Choose cold hardy seeds that will tolerate winter sowing and follow the instructions on the seed packet as directed for spacing and depth of planting. Some good choices include:

Amaranth, Aster, Bachelor Button, Bells of Ireland, Broccoli, Calendula, Cauliflower, Coneflower, Cosmos, Foxglove, Hollyhock, Lupine, Milkweed, Oregano, Radish, Rudbeckia, Salad Greens, Thyme, and Yarrow. 

Step Three: Label and seal the jug 

It’s helpful to label both the outside of the jug and include a plant label inside. Seal the jug closed. Use duct tape to connect the cut edges back together all the way around. Leave the top open. Keeping the cap off provides ventilation.

Step Four: Set the jugs in a sunny spot outside 

The jugs generally stay moist throughout the winter enduring rain, snow, and fluctuating temperatures. Water if needed. Open jugs in spring after seeds sprout and danger of frost has passed. When seedlings are at least two inches tall with two sets of true leaves, begin transplanting the seedlings into your garden beds or containers.

Starting seeds in containers outside during the winter months is a good way to grow sturdy seedlings that are already acclimated to outdoor conditions when it's time to plant in the spring. By trapping heat and moisture, the container creates a greenhouse effect, and the seeds are able to experience the required weathering process naturally at the same time that seeds are protected from the harsh winter elements. 

This article by Sara Elledge, UC Master Gardener of El Dorado County, originally appeared in the Mountain Democrat in December 2025. 

Have a winter gardening question? Ask us! Use our survey tool - click the button below - to send the details of your question and a UC Master Gardener of El Dorado County will get back to you. 

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Winter Dormancy: Gardening For the Fourth Season 

The winter holidays are just around the corner, and hopefully you have your garden in order. Spring bulbs are planted. Garlic and potatoes are in the ground. Your garden has been “put to bed.” Tools have been sharpened and put away. Tender plants are mulched and waiting for the anticipated winter rains. Most plants are entering their dormant cycle and you, no doubt, are ready to join them. 

Not so fast! Winter in the garden is a time for planting, pruning, and planning. 

Take advantage of winter dormancy with bare-root plants

Now is the time to take advantage of winter dormancy. From December through March, your local nursery will have bare-root plants. These are plants that are dug while they are dormant, and they will have their roots exposed. Often, they are more affordable than containerized plants, and they are easier to handle. 

You’ll find fruit trees, cane berries, asparagus, artichoke crowns, rhubarb, kiwi, strawberries, grapes, roses, and vines available as bare-root plants. Check with your local nursery early and after the first of the year. This gives you an opportunity to plan your location, prepare the planting hole when the ground is pliable but not soggy and get ready to welcome some new plants into your garden.

Understand the best time to prune

Mark your calendar: January is time for winter pruning, but you’ll want to plan and space your tasks between bouts of precipitation. Perennials that weren’t cut back in fall should be pruned in January. This is also the time to prune cane berries. 

Fruit trees require pruning to shape the tree and open the tree center for the spring growth. If you already have fruit trees, January is the time to apply horticultural oil to control scale, mites, aphids, and other insects. Once again, check the weather and make certain that there are at least 24 hours of dry weather around the application. 

Design with plant rotation in mind

Now before you relax and reach for the seed catalogues, grab a sheet of paper and make a quick drawing of last season’s vegetable and annual garden. Note where you planted each plant family and think about where you can rotate your plantings for the upcoming year. Plant rotation is an important step in sustainable gardening. Plant rotation builds and sustains helpful soil microbes, reduces the spread of soil-borne disease, helps plants take in more nutrients, and makes for a healthier garden. 

The goal with plant rotation is to avoid planting the same plant families in the same location year upon year. Ideally, you will rotate plant families from one bed to another over at least a four-year period. 

Planning is important before you shop those seed catalogues, because you don’t want to plan for too many tomatoes or melons if you haven’t set up a good rotation. Learning to identify which plants belong to the same family is your initial task. Tomato, pepper, eggplant, and potato belong together. Cucumber, melon, squash, pumpkins and gourds are related. Cabbage, broccoli, Brussels sprouts, kale, cauliflower, radishes are another family. 

Once you have your families grouped and a rotation schedule established, you can finally kick off your shoes, surround yourself with your seed catalogues, and slip into the gardeners’ relaxed winter dormancy and dream of spring. 

This article by Ola Jane Gow, UC Master Gardener of El Dorado County, first appeared in the Mountain Democrat. 

Have a Gardening question? Use the “Ask a Master Gardener” button below or call 530-621-5512.

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The Basics of Pruning 

Pruning isn’t just about keeping plants tidy, it’s about enhancing the health, structure, and appearance of your landscape. With the right tools and a little know-how, you can promote stronger growth, reduce disease, and even increase flowering in your trees and shrubs.

Pruning effectively starts with the tools

Effective pruning starts with having the right tools for the job. Hand pruners or clippers are ideal for small branches. Bypass pruners make clean, precise cuts; ratcheted pruners offer more power for tougher stems. Loppers with strong blades are great for medium to thick branches. Hedge shears are used for shaping hedges or shearing soft-stemmed plants. Saws are designed to cut through thick, woody branches cleanly, and pole pruners help reach tall limbs without needing a ladder. Battery-powered tools are wonderful, but always watch your fingers! The quality of your tools matters. Well-made tools are a smart investment, but they must be kept clean, sharp, and lightly oiled to prevent rust and plant disease transmission.

Prune trees and shrubs with a plan

Before you start snipping, take a moment to plan—envision your landscape at maturity. Consider how tall and wide your plants will get, and how your plantings fit with each other. Once you have in mind what you’d like your garden to look like in five years, you’re ready to start pruning. 

How, and also when you prune your plants matters

Removing suckers can be done any time of the year. These energy-draining shoots steal strength from the main plant and should be cut off at the base. Thinning crowded branches increases light penetration and airflow, preventing branches from rubbing, and thus reducing pests and diseases. Use heading cuts to control the height and width of trees and bushes. Cutting just above a bud encourages growth in the direction that bud faces. If major size reduction or redirection is needed, prune back to a lateral branch. This can strengthen the structure, slow down overgrowth, and shape the plant’s appearance. 

Try to not pollard a tree which is cutting branches off to be stubs. This creates weak connected branches and doesn’t create an aesthetically pleasing plant. Evergreens respond well to heading cuts, but be strategic. Since where you cut is where growth stops, prune with the plant’s final shape in mind to avoid awkward or no regrowth areas. Always remove dead wood, and if rejuvenating, usually the oldest, widest branches are cut out. A hard and fast rule is to never prune more than one-third of a tree or bush.

Proper timing of your pruning is critical for flowering shrubs and trees. Shrubs that bloom on new wood, like Rose-of-Sharon, Hibiscus syriacus, Butterfly Bush, Buddleja davidii, or Weigela should be pruned in late winter or early spring. Spring-flowering shrubs that bloom on old wood such as lilacs, forsythia, many hydrangeas, or azaleas, should be pruned immediately after flowering. This gives them the rest of the season to grow new branches and develop next year’s flower buds or even a second bloom cycle. 

Pruning can dramatically enhance the beauty and health of your yard. With the right timing, tools, and techniques, your garden will not only look better, but it will also thrive for years to come.

Reach out to the UC Master Gardeners in your county for specific guidance with your yard pruning. 

Have a gardening question? Use the “Ask a Master Gardener” button below, or, in El Dorado County, call 530-621-5512.

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This article, written by UC Master Gardener of El Dorado County Phyllis Lee, originally appeared in the Mountain Democrat.