Small indoor greenhouse can be used to grow many types of plants.
It’s also great for getting seeds started earlier than usual.
Keeping a greenhouse is an excellent way to grow a variety of plants year-round.
You don’t need a huge, expensive greenhouse to be able to enjoy indoor growing.
If you know what to expect from growing in a small space, you’ll be able to maximize your yields and get seedlings off to a great start.
You’ll also be able to anticipate issues before they become big problems.
If you’re interested in growing in a small indoor greenhouse, you’ll need to know what to grow, how to grow it, and what challenges you might face before you buy.
To learn all about getting started with greenhouse growing, check out these great tips.
Small Indoor Greenhouse Hacks For Maximizing Space
Decide on Your Small Indoor Greenhouse Size
A greenhouse doesn’t need to be huge, but you’ll need to make sure it has enough space to accommodate the plants you want to grow and any other gardening activities.
Generally, you’ll need a greenhouse that will have enough room for some shelving and benches as well.
Shelving provides more space by giving you extra surfaces for growing plants, small seedling pots, seed starter trays, and other essential equipment.
To find your perfect size, check the spot where you’ll place your mini greenhouse.
You’ll need to have a few feet of space on each side for easy access and maintenance.
Next, decide what plants you’ll be growing and how many you plan to grow.
This is extremely important when deciding what height and width you need for your greenhouse.
If you’re growing a few herbs or potted plants, you can get away with a very compact greenhouse.
If you’re growing greens, you’ll need more surface area for planting and growth.
When growing taller plants, you’ll need to ensure that they have plenty of room to reach their full height.
Plants with a climbing growth habit or those that require tall stakes will need a taller greenhouse as well.
Decide What Plants You’ll Grow
Different plants have very different space, lighting, and watering needs.
Your small indoor greenhouse must be able to accommodate these varying needs for successful plant growth.
If you cannot supplement with light, shade, or ventilation for certain types of plants, it’s best to avoid them.
Basic greenhouses are great for plants that all have similar needs.
If you want variety, be prepared to purchase special equipment or put in extra work for individual plant types.
Greenhouses can work for many plants if you plan ahead.
Taller plants like tomatoes can be grown in large tubs that sit on the ground.
Plants with vines and heavy fruit can be planted into the greenhouse’s dirt floor.
All other potted plants and seed trays can be stationed on higher benches or shelves.
With arrangements like the one previously mentioned, each plant receives the proper lighting and growth space.
They are less likely to crowd each other or block the sun.
Maximize Your Small Space
Greenhouses work best when you have a plan for plant and equipment arrangement.
This is especially true when you’re growing a diverse group of plants with different needs.
Benches and shelves are must-haves in a small growing space.
These give you extra surfaces for more plants.
They also ensure that shorter plants and smaller potted items can still receive enough sunlight to grow properly.
It keeps them from being shaded by taller and larger plants.
Benches and shelves can be made from many materials.
Redwood and cedar are common woods used in their construction because they resist rotting and are very sturdy.
Other storage and shelving options are sold that are made from lightweight metals such as aluminum.
Shelves require a bit more assembly, while benches can be used as-is right away.
Make Temperature Regulation a Priority
Temperature regulation can make or break a small indoor greenhouse.
Temperatures that are too high or too low can prevent sprouting, inhibit growth, and kill established plants.
Ideal greenhouse temperatures fall between 60 and 70 degrees Fahrenheit.
Sunlight through greenhouse windows and pane sections warm the area during the day when it’s chilly out.
This can be a problem when the sunlight is too strong, however.
Bright sunlight can cause the temperature to get too high in the greenhouse.
To avoid damage due to high temperatures, ventilation is necessary.
Most greenhouses come with ceiling or side vents.
These are opened during the day to let out excess heat and closed at night to keep out cold.
Heaters are often necessary for cold nights.
Greenhouses don’t generate heat. All of their warmth comes from sunlight during the day.
Using an electric greenhouse heater at night and vents during the day keeps the temperature steady for maximum plant growth.
There are also temperature alarms available that can alert you when temperatures inside your greenhouse become too extreme.
Choose Your Watering System
No matter what greenhouse size you’re working with, you’ll need an efficient way to water your plants.
Plants cannot thrive if they are over-watered or under-watered, so aside from temperature regulation, proper watering is imperative.
For a smaller greenhouse with mostly potted plants, your watering system could be as simple as a good watering can and well-drained pots.
For more delicate setups or more particular plants, you may need to install a drip hose system or overhead sprayers.
Plants that require high humidity will almost always need overhead misting throughout the day.
It’s a good idea to install a spigot so that you can easily connect to whatever irrigation system you choose for your plants.
Over-watering is a common mistake with small indoor greenhouse gardening.
When plants get too much water, they cannot receive enough oxygen.
It literally drowns plants.
Excessive water pushes out essential air pockets that are necessary for root health.
Also, when a plant absorbs too much water, pressure builds in its cells.
This can eventually lead to cell bursting and lesions on leaves.
Make sure your greenhouse plants have been potted in special soil that stays moist, yet drains quickly.
Moisture may not evaporate as thoroughly as it would for outdoor plants, so it’s important to occasionally check to make sure your plants aren’t staying soaked after watering.
Your shelving and benches should be slotted as well to avoid water pools that can lead to soggy roots.
They should never be made of solid pieces of wood or any other material that doesn’t have holes or slots for water drainage.
Feed Greenhouse Plants Properly
Potted greenhouse plants will need extra feeding.
They’re in a limited amount of soil, so they’re dependent on you to replenish depleted minerals and nutrients.
This is especially true during their growing seasons.
Ensure Your Lighting is Sufficient
Proper lighting is absolutely necessary for plants to grow to their full potential in your small indoor greenhouse.
Your greenhouse should be placed where sunlight is sufficient, but not harmful.
Greenhouses shouldn’t be completely shaded by trees or buildings.
That said, it’s important to point out that too much light is unfavorable as well.
Don’t place them in an area that gets unrelenting strong sunlight all day unless you’re available to place shade cloth over the structure.
If natural light sources are still an issue, buying grow lights is an option.
Follow instructions for each light so that plants are placed at the right distance from the light.
This ensures optimal light exposure for maximum growth.
Choose the Best Location
Location is key when keeping a small indoor greenhouse.
You should consider a number of factors, including:
- Whether or not the site is level and well-drained
- If the greenhouse will be under trees (especially if the greenhouse is glass), as branches could fall and cause damage
- Which direction the prevailing wind is coming from, as constant cold wind can blow in when the door is opened if it’s on the windy side
- Whether or not your greenhouse will have a windbreak, either natural or structural, to prevent interior heat loss
- Whether or not your location can be set up for water and electricity
Each of these considerations should help you choose the best spot available for your greenhouse.
Also, keep in mind your greenhouse’s purpose when deciding on a spot.
If you’re growing plants to maturity, you’ll need around 6 hours a day of sunlight.
If you’re mostly propagating or starting seeds in your greenhouse, you’ll need your location to be partially shaded.
Partial shade prevents excessive heat and light from damaging fragile seedlings and cuttings.
Consider a Small Indoor Greenhouse Kit
If the thought of putting up a greenhouse is a bit overwhelming for you, small indoor greenhouse kits are available.
These generally include everything you’ll need to set up a greenhouse inside and out.
Make the Most of Your Small Indoor Greenhouse
Greenhouse growing is all about making the most of your space so you can grow successfully throughout the year.
Are you looking to sell greenhouses or greenhouse kits?
If so, we’ve got some powerhouse templates for your next auction.