ACF Greenhouses Blog

The Complete Guide to Plant Grow Lights

2026-06-04T11:15:00-05:00

Every plant lover gets to a point where natural sunlight just isn't cutting it anymore. Whether you are trying to keep a seedling alive in a dark corner or keeping your plants happy through a bleak winter, indoor grow lights for houseplants are the ultimate fix.

But how do you know if your plants actually need one, which species benefit the most, and how do you pick the right type and size from our selection? Let’s break it down.

How to Know You Need a Grow Light

Plants are excellent communicators. If your windows aren't delivering enough natural light, your plants will start showing these clear distress signals:

The "Leggy" Stretch: Your plant grows long, skinny, fragile stems that lean aggressively toward the nearest window.
No New Split Leaves: For plants like Monsteras, a lack of light means new leaves will stay small and lose their dramatic splits (fenestrations).
Fading Colors: Variegated plants (like a Marble Queen Pothos) will lose their white patches and turn completely green as they desperately try to maximize chlorophyll production.
Constant Leaf Drop: The plant suddenly sheds older, lower leaves because it doesn't have enough energy to support its entire size.

Which Plants Benefit the Most?

While almost any indoor plant will appreciate a boost, certain varieties absolutely require strong lights for plant growth if they aren't sitting directly in a massive southern window:

The Sun-Worshippers (High Benefit): Succulents, cacti, citrus trees, fiddle leaf figs, and indoor herbs. Without intense light, these plants will quickly weaken and deteriorate.
The Tropical Giants (Medium-High Benefit): Monsteras, Philodendrons, Alocasias, and Birds of Paradise. A grow light keeps them pushing out those massive, iconic leaves year-round.
The Survivors (Moderate Benefit): Snake plants, ZZ plants, and Pothos. They can live in low light, but adding a gentle grow light will turn them from "just surviving" into exploding with new growth.

Understanding the Types and Sizes We Offer

When you look at our selection of plant grow lights, you don't need to feel overwhelmed. We have carefully curated our inventory into two main styles depending on your space and goals:

Standalone Grow Light Bulbs (The Sleek & Hidden Route)

What they are: High-efficiency, screw-in Grow Light Bulbs (standard E26 base) that fit right into regular household lamps as well as Freestanding and Clamp-on Fixtures.
Best for: A single premium plant on a side table, a desk setup, or integrating into your existing living room decor.
How to size it: If you have one or two plants clustered together, a single grow lamp bulb screwed into a flexible desk lamp or pendant light is all you need. It delivers needed energy without altering the aesthetic of your room.

Linear & Panel LED Fixtures (The Heavy-Lifter Route)

What they are: High output LED Grow Lights and Fluorescent Grow Lights designed to cast an even blanket of full-spectrum light over a larger area.
Best for: Multi-tier plant shelves, indoor greenhouse cabinets, or clustering a massive group of plants together on a table.
How to size it: Measure the area you need the grow light to cover and pick the light option that provides at least that amount of area coverage for your application.

How to Get Started

All of our grow lights utilize cool-running, energy-efficient LED technology, meaning they won't affect your electric bill or scorch your delicate leaves.

To give your plants the exact boost they're begging for, aim to run your lights for 12 to 16 hours a day. We also highly recommend plugging them into an Automatic Wall Timer so you don't have to remember to flip the switch!

Explore our complete collection to find the perfect fit.

Browse Grow Lights and Accessories Here

Ultimate Greenhouse Growing Guide for Beginners

2026-05-28T23:00:00-05:00

Greenhouse gardening completely transforms your relationship with the seasons. It allows you to protect delicate plants from unpredictable weather, start seeds weeks ahead of the local schedule, and harvest fresh vegetables, herbs, and flowers twelve months a year.

Whether you are setting up a compact backyard hobby greenhouse, a cold frame hoop house, or managing a heavy-duty commercial structure, controlling your microclimate is the ultimate key to success. This comprehensive guide breaks down the core fundamentals of greenhouse management across the United States and provides tailored, zone-by-zone planting blueprints.

Benefits of Greenhouse Gardening

Longer Growing Seasons

Break free from your local frost dates by starting earlier in the spring and harvesting deep into winter.

Better Plant Protection

Plants are protected from heavy rain, wind, hail, frost, and sudden temperature changes.

Improved Plant Growth

Controlled humidity and optimized light diffusion create a perfect environment, resulting in faster yields and healthier root systems.

More Crop Variety

Gardeners can grow plants that may not normally survive in their local climate.

Better Pest Control

Greenhouses significantly reduce pressure from outdoor pests like deer, rabbits, and destructive insects.

Choosing the Right Greenhouse

Need help picking the perfect model? Check out our comprehensive, step-by-step Greenhouse Buying Guide to find the right fit for your backyard and budget.

Where Should You Place a Greenhouse?

The best greenhouse location should:

Receive at least 6 to 8 hours of sunlight daily
Have proper drainage
Have access to water and electricity
Allow for ventilation and airflow

South-facing locations usually provide the best year-round sunlight exposure.

Greenhouse Heating Guide

To keep production moving during freezing weather, you must match your heating capacity to your target crop needs.

Common Greenhouse Heating Options

Gas Greenhouse Heaters

Essential for larger structures, commercial setups, or deep-winter growing in northern climates where electric utility costs would be prohibitive.

Electric Greenhouse Heaters

Highly efficient and easy to install for small, well-insulated hobby greenhouses.

Winter Greenhouse Temperature Recommendations

Seedlings and Propagation: 65°F–75°F
Warm-Season Vegetables: 55°F–70°F
Tropical plants: 65°F+
Cold-hardy greens: 40°F–55°F

Greenhouse Ventilation Guide

An unventilated greenhouse is a trap for excess humidity and stagnant heat. To keep air fresh and prevent fungal outbreaks, invest in a complete ventilation system.

Important Ventilation Equipment

Exhaust fans automatically pull hot, humid air out of the greenhouse
Intake Shutters open in sync with your exhaust fans to bring fresh air across the canopy
Circulation fans run constantly to mimic natural breezes
Automatic Vent Openers automatically open roof vents as temperatures rise

Signs Your Greenhouse Needs More Ventilation

Excess condensation
Mold or mildew
Wilting plants during hot weather
High humidity

Need a hand sizing your ventilation?

Don't guess on your airflow requirements. Run your greenhouse dimensions through our Greenhouse Exhaust Fan Size Calculator to determine the exact fan and shutter sizes required for adequate cooling.

Greenhouse Growing Calendar

January–February

Start onions, herbs, broccoli, peppers, and tomatoes
Prepare greenhouse heating systems

March–April

Start cucumbers, squash, herbs, and flowers
Begin transplanting cool-season crops

May–June

Peak vegetable planting season
Fertilize actively growing plants

July–August

Start fall crops like broccoli, kale, and cabbage
Manage summer heat using active cooling and overhead greenhouse shade cloth to prevent leaf scorch.

September–October

Grow cool-season vegetables
Extend harvest season

November–December

Clean greenhouse
Protect winter plants
Plan next growing season

Greenhouse Gardening Tips for Beginners

Start small and expand gradually
Monitor temperature daily
Invest in ventilation early
Avoid overcrowding plants
Use quality soil and fertilizer
Learn your USDA growing zone
Keep a seasonal planting calendar

Frequently Asked Questions About Greenhouses

What is the best greenhouse for beginners?

Small, durable polycarbonate hobby greenhouses are often the best choice for beginners. They provide excellent insulation, shatter-proof safety, and great light diffusion, making them highly forgiving for new growers. If you are looking for an ultra-strong option with unmatched ventilation and commercial-grade frames, check out our line of Grow More Greenhouse Kits.

Can you grow vegetables year-round in a greenhouse?

Yes! Many cool-season vegetables and hardy herbs can be grown completely year-round with proper planning and minimal winter heating. Warm-season crops like tomatoes can also be extended late into the year with dedicated supplemental heat and grow lights.

Does my USDA Plant Hardiness Zone matter if I am growing in a greenhouse?

Yes, your local plant hardiness zone absolutely matters. While a greenhouse protects your plants from frost, wind, and rain, it is still heavily influenced by the outdoor climate surrounding it.

If you live in a colder northern region (like Zone 5), your greenhouse will require significantly more insulation and heavy-duty winter heating to stay productive compared to a mild southern region (like Zone 8). Conversely, growers in warmer zones will need to focus much more heavily on active exhaust fans and shade cloth to prevent summer overheating. Knowing your zone helps you choose the right heating, cooling, and insulation equipment for your specific climate.

Not sure what zone you are in?

Use this quick USDA Hardiness Zone Finder to instantly find your exact growing zone by zip code so you can plan your greenhouse climate perfectly.

Final Thoughts on Greenhouse Gardening

Greenhouse gardening opens the door to healthier plants, extended growing seasons, and the joy of gardening every month of the year. With a foundational understanding of heating, ventilation, and watering, even absolute beginners can find incredible success growing fresh food and beautiful flowers in nearly any climate.

Zone 5 Greenhouse Growing Guide

2026-05-26T16:18:00-05:00

Complete Zone 5 Greenhouse Gardening Guide

USDA Zone 5 greenhouse gardening demands careful planning, heavy-duty winter insulation, and reliable heating systems. However, the payoff is immense: a greenhouse completely transforms your gardening capabilities in a climate defined by short summers and long, punishing winters.

Zone 5 includes parts of Minnesota, Wisconsin, Iowa, Nebraska, Michigan, New York, Vermont, and Maine. A greenhouse allows Zone 5 growers to easily overcome short outdoor growing seasons and cultivate heat-loving plants that would otherwise struggle to survive.

Zone 5 Climate Overview

Average Winter Temperatures

Zone 5 winter lows often range from -20°F to -10°F.

Growing Challenges

Short outdoor growing seasons
Harsh winters
Late spring frosts
Early fall frosts
Heavy snowpacks

Greenhouses significantly improve growing opportunities in Zone 5.

Zone 5 Greenhouse Growing Calendar

January–February

Maintain greenhouse heating carefully
Start onions, leeks, and hardy perennials

March–April

Start tomatoes and peppers indoors
Begin planting cold crops directly into greenhouse beds

May–June

Peak transplanting season begins
Continue frost protection when necessary

July–August

Peak outdoor summer heat
Keep fans running
Start fall vegetables indoors

September–October

Extend harvests inside greenhouse
Protect crops from early frosts

November–December

Winter greenhouse maintenance
Grow cold-hardy greens indoors

Heating Greenhouses in Zone 5

Reliable heating is critical in Zone 5.

Best Heating & Cool Weather Options

Modine Gas Heaters efficient fan-forced hanging gas heaters
Sterling Gas Heaters efficient fan-forced hanging gas heaters
Williams Direct Vent Gas Heaters wall mount gas heaters that don't require electricity
Greenhouse Bubble Insulation reduce heating costs with this clear insulation

Maintaining stable nighttime temperatures is essential during winter.

Final Thoughts on Zone 5 Greenhouse Gardening

Zone 5 greenhouse gardening opens the door to longer growing seasons, healthier plants, and successful vegetable production despite harsh winter conditions. With proper heating, insulation, and planning, greenhouse growers in colder climates can enjoy productive gardening nearly year-round.

Zone 6 Greenhouse Growing Guide

2026-05-25T16:18:00-05:00

Complete Zone 6 Greenhouse Gardening Guide

USDA Zone 6 offers incredible opportunities for greenhouse growers, allowing gardeners to dramatically extend their growing seasons and protect delicate crops from harsh, sub-zero winter conditions. However, greenhouses help Zone 6 gardeners extend growing seasons dramatically.

Zone 6 covers large portions of Pennsylvania, Missouri, Kentucky, Kansas, Colorado, Illinois, Indiana, and Ohio.

Zone 6 Climate Overview

Average Winter Temperatures

Zone 6 winter lows usually range from -10°F to 0°F.

Growing Season

Zone 6 has:

Moderate growing seasons
Cold winters
Strong spring and summer growing conditions

Zone 6 Greenhouse Growing Calendar

January–February

Maintain steady greenhouse heating
Start hardy onions, leeks, and early peppers under grow lights

March–April

Begin seeding tomatoes and herbs
Start transplanting cool-season crops into greenhouse beds

May–June

Main summer transplanting
Increase watering as temperatures rise and open vents fully

July–August

Start fall crops inside of the greenhouse
Watch greenhouse temperatures carefully to prevent overheating

September–October

Extend summer harvest season
Start planting cool-season salad greens

November–December

Protect plants from freezing conditions
Focus on winter greenhouse maintenance

Heating a Greenhouse in Zone 6

Because winter temperatures regularly drop below zero, reliable heating is a top priority for any year-round Zone 6 grower.

Recommended Heating Options

Modine Gas Heaters efficient fan-forced hanging gas heaters
Sterling Gas Heaters efficient fan-forced hanging gas heaters
Williams Direct Vent Gas Heaters wall mount gas heaters that don't require electricity
Greenhouse Bubble Insulation reduce heating costs with this clear insulation

Cold nights may require consistent supplemental heat.

Ventilation & Humidity Control

Even cold climates need greenhouse ventilation.

Important equipment includes:

Exhaust Fan Systems automatically pull hot, humid air out of the greenhouse
Circulation Fans run constantly to mimic natural breezes and reduce condensation

Final Thoughts on Zone 6 Greenhouse Gardening

Greenhouse gardening in Zone 6 allows growers to dramatically extend their growing season while protecting plants from cold winter conditions. Proper heating, insulation, and ventilation help create a productive year-round growing environment.

Zone 7 Greenhouse Growing Guide

2026-05-22T16:18:00-05:00

Long Growing Seasons, Balanced Climate

USDA Zone 7 is an exceptional climate for greenhouse gardening. Featuring moderate winters, long natural growing seasons, and hot summers, it offers the perfect environment to grow a variety of vegetables, herbs, flowers, and tropicals with minimal seasonal adjustments.

Zone 7 includes parts of Virginia, North Carolina, Tennessee, Oklahoma, Arkansas, New Mexico, Oregon, and Washington. Greenhouse growers in Zone 7 can easily maintain continuous production year-round with proper planning and light winter heating.

Zone 7 Climate Overview

Average Winter Temperatures

Zone 7 winter lows typically drop down between 0°F and 10°F.

Growing Season Length

Gardeners here enjoy long, vibrant growing seasons, giving them early spring planting windows and exceptionally long autumn harvest options.

Frost Dates

Average last frost occurs from March to April
Average first frost occurs from October to November

Zone 7 Greenhouse Growing Calendar

January–February

Start peppers and onions
Begin early tomato seedlings
Maintain steady greenhouse heating

March–April

Seed cucumbers and squash
Move cool-season crops outside
Increase greenhouse ventilation

May–June

Peak growing season begins
Open exhaust shutters
Transition to daily watering

July–August

Start fall vegetable varieties
Monitor greenhouse temperatures carefully

September–October

Plant cool-season greens
Extend tomato harvests

November–December

Protect tender plants from freezing temperatures
Keep cold-hardy lettuce and spinach varieties going strong indoors

Heating a Greenhouse in Zone 7

Zone 7 winters are moderate compared to northern states, but seasonal greenhouse heating is still required during freezing winter nights to protect warm-season crops or sensitive perennials.

Popular Heating Options

Vented gas, propane, and electric heaters are all popular choices for keeping winter temperatures stable. Here at ACF Greenhouses, our recommended choices include:

Electric Heaters inexpensive option for small hobby greenhouses
Modine Gas Heaters recommended for larger hobby greenhouses as well as commercial structures
Sterling Gas Heaters recommended for larger hobby greenhouses as well as commercial structures
Williams Gas Heaters good alternative to electric heat in smaller greenhouses

Ventilation Tips for Zone 7 Greenhouses

Zone 7 summers can quickly become intensely hot and humid. To prevent severe heat stress, damping-off, and fungal diseases, every Zone 7 greenhouse must be equipped with a reliable ventilation setup. Important ventilation equipment includes: (More detailed information is available in our Greenhouse Supplies Guide)

Exhaust Fan Systems automatically pull hot, humid air out of the greenhouse
Circulation Fans run constantly to mimic natural breezes and reduce condensation
Shade Cloth keep a greenhouse from heating up as quickly and provide shade to plants that don't grow well in full sun

Final Thoughts on Zone 7 Greenhouse Gardening

Zone 7 is one of the most versatile greenhouse growing regions in the United States. With moderate winters and long growing seasons, greenhouse gardeners can successfully grow vegetables, herbs, flowers, and tropical plants for most of the year.

Zone 8 Greenhouse Growing Guide

2026-05-21T16:10:00-05:00

Complete Zone 8 Greenhouse Gardening Guide

USDA Zone 8 offers incredibly mild winters and exceptionally long, warm growing seasons, making it one of the absolute easiest climates for greenhouse gardening. Many Zone 8 growers are able to maintain continuous, abundant production year-round with almost no supplemental heating costs.

Zone 8 spans across parts of Texas, Georgia, South Carolina, Louisiana, Alabama, Arizona, California, and the Florida Panhandle.

Zone 8 Climate Overview

Average Winter Temperatures

Zone 8 winter lows typically range from 10°F to 20°F.

Growing Advantages

Long growing seasons
Earlier spring planting
Reduced winter heating costs
Strong fall growing opportunities

Zone 8 Greenhouse Growing Calendar

January–February

Start tomatoes and peppers
Keep growing cool-season greens

March–April

Begin aggressive spring planting
Increase ventilation during warm afternoons

May–June

Monitor greenhouse heat closely
Use protective shade coverings when necessary

July–August

Control humidity and heat buildup
Start fall vegetable crops indoors under cooler conditions

September–October

Excellent growing conditions return
Plant lettuce, kale, and cold-hardy greens

November–December

Continue cool-season production
Minimal heating may be required

Heating & Cooling Greenhouses in Zone 8

In Zone 8, cooling and heat management are far more critical than winter heating.

Important Cooling Equipment

Exhaust Fan Systems automatically pull hot, humid air out of the greenhouse
Shade Covers keep a greenhouse from heating up as quickly and provide shade to plants that don't grow well in full sun
Circulation Fans run constantly to mimic natural breezes and reduce condensation
Evaporative Coolers blow cooled air in from outside acting like an air conditioner for your greenhouse

Winter Heating

Many growers only need occasional supplemental and/or spot heating during cold snaps.

Common Heating Options

Electric Heaters inexpensive option for small hobby greenhouses
Plant Heating Mats recommended for larger hobby greenhouses as well as commercial structures

Final Thoughts on Zone 8 Greenhouse Gardening

Zone 8 is one of the easiest regions for greenhouse gardening thanks to its mild winters and long growing seasons. Proper cooling, ventilation, and watering are the keys to successful greenhouse growing in warmer climates.

Want a Small Greenhouse with Polycarbonate Panels for your Backyard?

2022-04-20T09:54:00-05:00

If you are looking to buy a small greenhouse for your backyard, it is a good time to so do. There have never been as many greenhouse kit options available as there are now. The down side is it can be difficult to choose the best one for your needs. One thing is for certain. Polycarbonate panels have become the most popular covering for backyard greenhouse kits. This is because polycarbonate has many advantages over traditional coverings like poly greenhouse film and glass. The list below refers to multiwall polycarbonate specifically like twin wall, triple wall, and five wall variants.

3 Main Advantages of Greenhouse Polycarbonate:

Polycarbonate has Better Insulation
Multiwall polycarbonate panels have insulating air space built into them which makes them one of the best insulated greenhouse coverings available especially for the price. Better insulation means the greenhouse kit will be easier and cheaper to heat.
Polycarbonate is More Durable (Stronger & Longer Lasting)
Polycarbonate panels are much more duarble than glass and poly film. They can withstand hurricane force winds and impacts from flying objects that would shatter glass panels and puncture greenhouse plastic films. Quality UV protected versions have an average life of 12 to 15 years which will save you the time and cost of replacing your greenhouse's cover every few years like with polyetheylene platsic.
Polycarbonate Provides a Better Growing Environment for Plants
Plants in greenhouses covered with multiwall polycarbonate panels receive a more diffused light which means plants will not burn from direct sunlight like in a glass covered backyard greenhouse. Instead the plants receive a more even amount of light to all of the plant's foilage.

When looking to purchase a small backyard greenhouse with polycarbnate panels, be wary of kits priced under $1000. Many of them come with a cheaper single layer polcarbonate referred to as corrugated polycarbonate which offers no insulation or light diffusion properties. We have also heard many tales of entry level small greenhouse kits coming with twin wall panels that need to be replaced within a couple years. To save money, some companies are using panels with very little if any UV protection. This can be an expensive repair because the cost of replacing all the panels on a greenhouse is usually at least half the cost of the whole greenhouse.

Multiwall polycarbonate is available in many different thicknesses. Thicker panels offer better insulation and increased rigidity allowing them to withstand higher winds and heavier snow loads. There is a trade-off though because of decreased light transmission into the greenhouse. Our Grow More greenhouses come with 10mm triple wall polycarbonate panels which offer the best mix of strength, insulation, and light transmission in the industry.