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Indoor plants: Tips for radishes, lettuce & other edibles

Think it’s too hot to garden? You can grow edible plants such as herbs, radishes, turnips and arugula right inside your South Florida home. Yes, you can grow your own food indoors.

We asked for tips from a South Florida urban horticulture program specialist affiliated with the University of Florida Institute of Food & Agricultural Sciences, also known as IFAS.

Photo: University of Florida/IFAS

Maybe you’ll be inspired. Ideally, you’ll be richly rewarded with a delicious sense of accomplishment and tasty freshly harvested produce.

Read our Q&A with Samuel Chillaron, Urban Horticulture Program specialist, Florida Yards and Neighborhoods Program for UF/IFAS Extension Office in Davie. Thanks, Sam!

Sam Chillaron

Q: What edible plants work well indoors in South Florida?

A: The summer is a unique time for indoor gardening in South Florida. Our climate-controlled homes, combined with the longer days of summer, can make for good indoor growing conditions – especially for herbs and baby greens.

In general, the edible plants that perform best indoors are those that grow quickly and are smaller in stature. This includes a large variety of herbs, leafy greens, micro-greens and (some) root vegetables, such as radishes and turnips.

The more direct light that can be provided to your indoor edibles, the wider the variety of plants you can grow. Leafy greens and herbs require an average of 4-6 hours of light to grow a harvestable yield. This can be supplied reasonably by a windowsill or a sunward facing sliding glass door.

Popular vegetables producing fruits or crunchy stems like tomatoes, broccoli and strawberries require at least 6-8 hours, and when grown indoors will require supplemental lighting. This can get expensive, considering the cost of grow lights and their energy expenditure.

 Q: What type of indoor set-up and equipment is required?

A: As with any gardening endeavor, our main guiding principle is Right Plant, Right Place. We want to put our indoor edible gardens in the sunniest part of the house. Almost all edible plants need ample sunlight in order to grow well.

The simplest set-up involves nothing more than a pot with drainage holes, potting mix, a tray or dish to catch excess drainage water and a sunny window or glass door for the plants to sit next to.

Most South Floridians keep the temperature inside the home somewhere between 75 and 80 degreesF during the summertime and throughout most of the year. Luckily, this is also the ideal temperature range for growing most of our favorite vegetables.

For indoor gardeners lacking sunny windows or natural sunlight, the next best option will be the use of grow lights. The set-up for this type of indoor garden involves the lights themselves, a stand or shelf to mount the light over the plants and a container garden or hydroponics growing system. If the indoor garden is large enough or the grow lights being used generate excessive heat, a fan or cooling system will also be required.

One of the most popular indoor gardening set-ups involves using stainless steel wire shelving, shop lights and LED grow lights. This system is perfect for indoor growers who are looking to experiment with micro-greens and growing their own plants from seed as well.

Q: Is this expensive, or is it valuable for people seeking to reduce food expenses?

A: Indoor gardening can either be very cheap or very expensive depending on your goals. If you have a sunny spot in the house and frequently purchase micro-greens, baby greens or herbs such as cilantro, parsley or chives, then growing your own at home is definitely a great way to save on these high value crops and enjoy the fruits of your labor.

For larger vegetables, such as tomatoes, peppers or strawberries, the higher investment in necessary equipment to achieve worthwhile yields may not be worth it economically speaking. You are probably better off supporting your local farmers by purchasing these crops from them.

Q: What are the easiest indoor edibles for novices?

A: In the area of leafy salad greens, arugula is by far the easiest to grow. It germinates quickly and provides multiple harvests. Once it grows to about 6 inches tall you can harvest with a knife or pair of scissors by simply cutting the plants about an inch above the line of the soil. In one to two weeks, the arugula will be ready for another cut and come again harvest.

Indoor gardeners may also be interested in trying to grow other baby greens such as mizuna, mustard greens and tatsoi. Simply sprinkle the seeds over the surface of the soil and cover with a dusting of potting mix. Water them in with a light spray of water (a spray bottle works well) and keep moist to ensure even germination. Kale, collard greens and Swiss chard may also be grown in the same way for baby greens. Lettuce is a bit more challenging, as it loves to grow in bright light, but it is also worth trying. Follow the same growing steps as the above for baby greens.

When it comes to herbs, most are relatively easy to grow; however, seed germination time is longer. The trick is to keep the potting soil moist, but not to overwater. It is OK to allow the top of the soil to dry slightly in between watering. Many herbs are also easily grown from cuttings. Rooting hormone is often not necessary. Simply clip a branch from a friend’s plant, remove leaves from the bottom portion of the cutting, insert into a small pot with potting mix and keep moist for about two weeks. Pretty soon roots will start to develop. Excellent herbs for the indoor garden include cilantro, parsley, basil, garlic chives and thyme.

Another indoor crop worth trying is microgreens. Microgreens are edible plants that are only grown to the first true leaf stage after germination. It is believed that because growth is powered by the stored energy of the seed, it is at this baby stage that the plants are at their nutritional peak for consumption. The easiest microgreens crops to grow for beginners are sunflower shoots and pea shoots. Many micro-green kits are available for purchase online as is the bulk seed necessary to grow them.

The basic steps are to fill a tray with potting mix and to densely sprinkle the seeds over the surface of the soil. A dusting of potting mix over the top of the seeds is not required. Moisten the seeds with a light spray and nest an empty tray with the same dimensions over the top of the seeds. In about one week most of the seeds will have germinated and the empty top tray will begin to rise as the seeds literally push it up.

At this point, you want to flip the top tray around to create a dome or shell over the germinating seeds. Your goal is to temporarily block out the light. This will encourage the microgreens to grow upwards and elongate, creating more food. Once the seedlings reach the top of the upper tray, remove the tray. The seedlings will be long and mostly white and yellow. Gradually expose these elongated seedlings to light and they will green up. Once they are nice and green, simply cut the microgreens at soil level and enjoy.

Q: Do you do this at home, and what are your favorite plants?

A: Yes, I do maintain a small indoor garden on my kitchen windowsill, consisting mostly of herbs. My favorites to grow are basil, garlic chives, thyme, cilantro, parsley and rosemary. When I am cooking, there is nothing more enjoyable than harvesting what I need right then and there to add the freshest possible flavors to my food.

Q: Any other tips or thoughts on why South Floridians would want to try this in their own homes?

A: Indoor gardening is a great way for those without traditional backyard space to experience the joy of growing their own food. It is not only functional, but very therapeutic and rewarding.

If you choose to grow your indoor edibles in containers, with some plants you will eventually need to up-pot them as they grow larger and larger. The key to doing this correctly is to gradually increase the pot size rather than going from a small pot directly to a very large pot. By slowly increasing the pot volume over time you will prevent issues related to over-watering.

Many of your indoor edibles will also benefit from periodic applications of fertilizer. I recommend a slow-release organic fertilizer – there are many available on the market. As with any fertilizer or pesticide, whether its organic or not, it is important to read the label and use according to the instructions.

As for watering, you want to check your plants daily. Apply water only if the surface of the soil looks dry. Your goals should be to thoroughly water so that the entire volume of the soil in the pots becomes wet. Lifting the plants before they are watered and after they are watered will help you to develop a sense of whether you watered enough. There should be a significant weight difference between plants that have been watered well and those that are still thirsty.

Gardening is a skill like any other. With time and patience, anyone can learn to do it well and produce bountiful harvests.

For outside: Florida landscaping: Free resources to enhance your yard

Other resources from IFAS

Free and cheap things to do in South Florida this week

Thursday, August 11, 2022

Palm Beaches Restaurant Month

All Day | Discounted

Jupiter Hammerheads baseball

$6.00-12.00 | Roger Dean Chevrolet Stadium

"Beauty & The Beast" discount

Discounted | Adrienne Arsht Center

Discounted $13 entry fee

Discounted | Fairchild Tropical Botanic Garden

Tai Chi class

8:00 am to 10:00 am | FREE | Norton Museum of Art

'Nature Connects' LEGO exhibit

10:00 am to 5:00 pm | Discounted | Fairchild Tropical Botanic Garden

Nickelodeon's "Teenage Mutant Ninja Turtles: Secrets of the Sewer"

10:00 am to 6:00 pm | Discounted | Miami Children’s Museum

Food trucks and music

5:00 pm to 9:00 pm | FREE | Wellington Village Park

Enjoy live entertainment at Clematis by Night

6:00 pm to 9:00 pm | FREE | West Palm Beach Waterfront

Free live music at Hollywood beach bandshell

7:00 pm to 9:00 pm | FREE | Hollywood beach bandshell

Summer Symphony event in Pembroke Pines

7:00 pm to 9:00 pm | FREE | Susan B. Katz Theater of the Performing Arts

Live music at Doral Yard

7:00 pm to 9:30 pm | FREE | Doral Yard

$12 Adult Skate Night

7:00 pm to 10:00 pm | $12.00 | Xtreme Action Park

Community Jam Session

8:00 pm to 10:00 pm | FREE | South Florida Center for Percussive Arts

Free Movie: Who Framed Roger Rabbit

8:30 pm to 10:30 pm | FREE | Altos Del Mar Park

Friday, August 12, 2022

Palm Beaches Restaurant Month

All Day | Discounted

Jupiter Hammerheads baseball

$6.00-12.00 | Roger Dean Chevrolet Stadium

"Beauty & The Beast" discount

Discounted | Adrienne Arsht Center

Discounted $13 entry fee

Discounted | Fairchild Tropical Botanic Garden

Free Water Shuttle Weekends

10:00 am to 3:00 pm | FREE | Deerfield Island Park

'Nature Connects' LEGO exhibit

10:00 am to 5:00 pm | Discounted | Fairchild Tropical Botanic Garden

Nickelodeon's "Teenage Mutant Ninja Turtles: Secrets of the Sewer"

10:00 am to 6:00 pm | Discounted | Miami Children’s Museum

Food truck gathering at Tropical Park

5:30 pm to 10:30 pm | FREE | Tropical Park

Splashtacular at water park in Hollywood

6:00 pm to 8:00 pm | $7.00 | TY Park

Summer Nights in Oakland Park

6:00 pm to 10:00 pm | FREE | Pastorius Park

Food In Motion vendor fair in Fort Lauderdale

6:00 pm to 11:00 pm | Feldman Park

Live music at Gulfstream in Hallandale

6:30 pm to 9:30 pm | FREE | Gulfstream Park Village

Water Taxi Sunset cruise with live entertainment

6:30 pm to 9:30 pm | $20.00 | Intracoastal Waterway

Jam on percussion for free

7:00 pm to 9:00 pm | FREE | South Florida Center for Percussive Arts

Free live music at Hollywood beach bandshell

7:00 pm to 9:00 pm | FREE | Hollywood beach bandshell

Free Friday Drum Jam

7:00 pm to 9:00 pm | FREE | South Florida Center for Percussive Arts

Battle of the Bands free concert

7:00 pm to 9:00 pm | Mizner Park in Boca

Starlight Musicals live entertainment

7:00 pm to 10:00 pm | FREE | Holiday Park

Free movie in West Palm Beach

7:00 pm to 10:00 pm | FREE | Waterfront Commons

Live music at Grandview in West Palm

7:00 pm to 10:00 pm | FREE | Grandview Public Market

Free live music at Dolphin Mall

7:00 pm to 11:00 pm | FREE | Dolphin Mall

Live Music at Doral Yard

8:00 pm to 10:00 pm | FREE | Doral Yard

Free outdoor family-friendly films

8:00 pm to 10:00 pm | FREE | ArtsPark

Free dive-in movies in Pompano

8:00 pm to 10:00 pm | Houston/Sworn Pool

Saturday, August 13, 2022

Jewish Museum of Florida-FIU free every Saturday

All Day | FREE | Jewish Museum of Florida-FIU

Palm Beaches Restaurant Month

All Day | Discounted

Jupiter Hammerheads baseball

$6.00-12.00 | Roger Dean Chevrolet Stadium

"Beauty & The Beast" discount

Discounted | Adrienne Arsht Center

Discounted $13 entry fee

Discounted | Fairchild Tropical Botanic Garden

Sunrise comic con

$14.00-20.00 | Sunrise Civic Center

$5 all-day fares weekends on Tri-Rail

5:00 am to 11:30 pm | $5.00

Free vaccinations for children

7:30 am to 2:00 pm | FREE

Plantation Farmers Market

8:00 am to 12:00 am | FREE | Volunteer Park Plantation

Las Olas Oceanside Park Farmers, Antiques & Artisan Market

9:00 am to 12:00 am | FREE | Las Olas Oceanside Park

Splash In The Pines

10:00 am to 1:00 pm | FREE | West Pines Soccer Park

Free Water Shuttle Weekends

10:00 am to 3:00 pm | FREE | Deerfield Island Park

Free Family Fun Day at HistoryMiami museum

10:00 am to 4:00 pm | FREE | HistoryMiami

Free admission to Norton Museum of Art for Palm Beach County residents

10:00 am to 5:00 pm | FREE | Norton Museum of Art

'Nature Connects' LEGO exhibit

10:00 am to 5:00 pm | Discounted | Fairchild Tropical Botanic Garden

Sensory Friendly Saturday

10:00 am to 6:00 pm | FREE | Miami Children’s Museum

Nickelodeon's "Teenage Mutant Ninja Turtles: Secrets of the Sewer"

10:00 am to 6:00 pm | Discounted | Miami Children’s Museum

Sawgrass Farmer's & Artisan's market

10:00 am to 8:00 pm | FREE | Sawgrass Mills

Artisan Show

10:00 am | FREE | Dolphin Mall

Discount kids' movies

11:00 am to 1:00 pm | Discounted | Coral Gables Art Cinema

PAMM free day with family activities

11:00 am to 6:00 pm | FREE | Perez Art Museum Miami (PAMM)

Farm Tours at Tradewinds Park

11:30 am to 2:00 pm | $3.00-4.50 | Tradewinds Park

Free tour of the Adrienne Arsht Center

12:00 pm to 1:00 pm | FREE | Adrienne Arsht Center

Kidz Fest with fashion show in Plantation

1:00 pm to 4:00 pm | FREE | Broward mall

Merrick House Museum Guided Tours

1:00 pm | $0-5.00 | Merrick House Museum

Family Day free admission

2:00 pm to 5:00 pm | FREE | Coral Gables Museum

Dania Pointe offers Bubble Bash

2:00 pm to 7:00 pm | FREE | Dania Pointe

Downtown Palm Beach Gardens free summer concert series

3:00 pm to 6:00 pm | FREE | Downtown at the Gardens

Black Pepper Food & Wine Festival

3:00 pm to 8:00 pm | FREE | FIU Biscayne Campus

Dania After Dark Street Festival

5:00 pm to 10:00 pm | FREE | Dania City Hall

Free live music at Hollywood beach bandshell

7:00 pm to 9:00 pm | FREE | Hollywood beach bandshell

Herp Tour

7:00 pm to 9:00 pm | $0-15.00 | Deering Estate

Live music at Grandview in West Palm

7:00 pm to 10:00 pm | FREE | Grandview Public Market

Free live music at Dolphin Mall

7:00 pm to 11:00 pm | FREE | Dolphin Mall

Laser Evening: Elton John

7:00 pm to 11:30 pm | $8.00-10.00 | Phillip and Patricia Frost Museum of Science

Live Music at Doral Yard

8:00 pm to 10:00 pm | FREE | Doral Yard

Night sky viewing with telescopes

8:00 pm to 11:00 pm | FREE | Fox Observatory

Discount late-night movies

11:30 pm to 2:00 am | $5.00 | Coral Gables Art Cinema

Patti Roth

About Patti Roth

Patti Roth, the editor of Fort Lauderdale on the Cheap, scouts out state and national deals, discounts and coupons for our readers, finding the real deals and presenting them in an easy-to-read format. A veteran newspaper and magazine writer and a longtime South Florida resident, she has written for The Miami Herald, The Sun-Sentinel in Fort Lauderdale, Florida Travel and Life, E Environmental Magazine, Dog Fancy, Cat Fancy, US Architecture and Earth911.com. Send your cheap tips to her at info@fortlauderdaleonthecheap.com.

Living on the CheapMiami on the Cheap is a member of Living on the Cheap, a network of websites published by frugalistas, journalists and consumer advocates. Find practical advice on saving money on groceries, travel and shopping, plus tips from our experts on how to live the good life for less at Living on the Cheap.

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