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. 

Ask a Master Gardener

Scents of Spring Shrubs 

Ahhhh…Spring! Our California foothills spring flowering shrubs are not only stunning to look at but also provide alluring fragrances. In planning for the future, here are some of the most fragrant early blooming spring shrubs that you can add to your garden, which provide the promise that winter will soon be ending.

Let’s start with common Lilacs, Syringa vulgaris. There is nothing quite like the air being perfumed by these springtime favorites. They are also loved for their toughness and reliability. Once established, these shrubs can live for over 100 years. The floral stems are great for cutting and bringing inside to enjoy. Pollinators, such as butterflies, seek out lilacs. The blooms usually come in a fluffy variety of purple colors, pale to very dark. There are also varieties of white, cream, and pink.

Even though it is not in the same botanical family as common Lilacs, you may want to consider getting California Wild Lilac, Ceanothus spp. A native, drought tolerant, fragrant, perennial shrub, it can also act as a ground cover. This beloved native shrub turns the California hillsides blue. They do well in infertile conditions, have natural nitrogen fixing abilities and do not need feeding. They appreciate our Mediterranean climate. Bees and butterflies love them!

Who could resist the early blooms and fragrance of the Sweet Box plant, Sarcococca? Its tiny white flowers, with vanilla scent, fills the air for weeks in February and March. Dark green leafed, this evergreen ornamental shrub is outstanding. It thrives in partial shade, is tolerant of tree roots, low irrigation, and does well in a large container. Another plus, deer don’t seem to like really them.

The intoxicating scent of Winter Daphne, Daphne odora, will make guests at your spring garden say, “What smells so good?” Clusters of the scented pink and white flowers open gradually, but when they do, you immediately know Daphne is blooming. The fragrance is exquisite. Good drainage is key in successfully growing this shrub. Add ample compost to lighten the soil, so it will drain quickly. Ideal in large pots, situate it in partial shade near your door, so you can enjoy its delightful floral perfume as you are leaving or coming home.

Once established, the luscious four-petaled, citrus scented white blooms of the native California Mock Orange, Philadelphus lewisii, can beautifully frame a garden gate or trellis. This native plant was discovered and collected in 1806 by Lewis & Clark during their famous overland expedition to the West. It is a tough, drought tolerant shrub that needs little supplemental water. The early season nectar supports pollinators including bees, birds, and insects. The arching woody branches provide nesting cover for birds. Easy to grow, plant in full or partial sun, using average garden soil. 

If one of your gardening goals is to experience a scent-sational, springtime yard, consider adding some of these uniquely fragrant shrubs. The moment you get a delightful whiff, you’ll wonder how you ever lived without them.

This article by UC Master Gardener of El Dorado County Pauline Atkins originally appeared in the Mountain Democrat in March 2026. 

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. 

Ask a Master Gardener

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