The Letpot LPH-Max is a unique, multi-purpose indoor garden with lots of advanced features. From seed starting to growing large plants, this medium hydroponic system can do it all – and is affordably priced!
When it comes to hydroponics, bigger is often better.
I’m always attempting to grow as many vegetables as possible inside my apartment…
So I tend to gravitate towards large indoor gardens that can grow fruiting vegetables.
I love growing the bigger plants, like peppers, tomatoes and cucumbers.
The Aerogarden Farms were my favorite indoor garden machine for a long time. In fact, I have an entire wall of them!
But ever since the company shut down and re-org’ed, Aerogarden seems to have discontinued the indoor garden.
So there’s definitely been a gap in the market for large hydroponic machines.
LetPot
I discovered LetPot a couple years ago and was impressed.
They’re a great alternative to Aerogarden and they’ve been quietly filling the gap in the marketplace.
LetPot focuses on affordability and innovation.
They’ve introduced several new products in the last couple years that I really love, like this EC meter and reusable silicone pod covers.
My overall experience with the brand has been quite good.
And since all their products are well-priced, I’ve slowly tried out more and more from the brand.
I’ve tried out so many of LetPot’s indoor gardening products, because they’re well-designed, good quality and often on sale for a great price. From left to right, lettuce grown in the LetPot LPH-Air, re-usable pod basket covers and pompom zinnias grown in the LetPot LPH-Home.
The Indoor Gardening Guide
Cyclosporiasis, e.coli — whatever outbreaks affect grocery produce hasn’t phased me
…because I grow my own clean, pesticide-free lettuce!
If you’re looking to start an indoor garden, I’ve written down my exact process for growing herbs, leafy greens and fruiting vegetables in my ebook:
Go from black thumbs to flourishing indoor gardener! See a sneak peek inside here
LetPot LPH-Max
I picked up a LPH-Max garden in 2022 and have been using it for about 4 years now!
It’s one of my most-used gardens because it’s quite multi-functional.
Here’s my review of the LetPot LPH-Max after using it consistently for the last four years.
Letpot’s Indoor Gardens
I think it’s helpful to place the LetPot max within the context of the brand’s product lineup.
The company currently has 4 different indoor gardens.
3 are countertop gardens, designed to sit on your kitchen counter or a tabletop piece of furniture.
The LPH-Max is the largest of the countertop sized gardens.
I previously reviewed the LPH-Air, their smallest countertop garden here, and the LPH-Senior, their medium stainless steel garden here.
Read more: Is the Letpot Air the Best Affordable Indoor Garden?
Fall 2026 update:
LetPot just announced a new indoor garden!
It’s a stunning, 2-tier floor garden that has space for up to 32 plants and comes with a rolling plant stand.
You can read my first impressions + review of it here.
It’s available for pre-order here for a limited time.
Customers who order during the pre-launch window get $200 off the garden (for the lowest price it will ever be offered at), plus an extra $100 in LetPot freebies!
They also get first access so definitely check it out before the pre-sale period ends if you want the best deal.
Letpot LPH-Max
The LetPot LPH-Max has a 21 plant capacity and measures 14.5 inches wide by 10 inches deep.
It’s a medium sized machine that can fit in a large kitchen, or on any piece of furniture.
The garden has a 36 watt light capacity (pretty strong for indoor gardens and great for growing larger vegetables).
And the light has a height extension of 21 inches.
What’s Included
The LetPot LPH-Max is available on LetPot & Amazon.
When it arrived, it was very neatly packaged with the stainless steel indoor garden, along with several accessories.
It Comes With:
- 21 pod baskets + 21 sponges
- 2 big baskets + 2 big sponges
- humidity domes
- shade covers
- stickers
- A and B nutrients
- plant labels
- pole supports
- piping for automatic watering
Two Tray Design
What I really like about the LetPot Max is the dual deck tray design.
21-Pod Tray
If you want to maximize the garden to grow as many plants as possible, you can use the 21 pod tray.
This would work well for smaller, non fruiting plants like herbs, lettuces and Asian greens.
I also use this as a seed starting tray.
Because it has so many spots, I can start 21 seedlings and transplant them to my other indoor gardens. It saves on electricity, cleanup and maintenance by concentrating them in one garden.
I also use it to seed start transplants for my Lettuce Grow Farmstand (more on that later).
2-Pod Tray
If you want to maximize the garden to grow large plants, you can use the 2 pod tray.
This allows you to grow just 2 plants, but give each plant as much room as possible.
It’s useful for large fruiting plants like tomatoes, peppers, cucumbers and eggplants.
While you can use the 21 pod tray and cover the empty spaces, it’s a cleaner and sleeker look to use the 2 pod tray if you plan to only use two grow spaces!
growing pickling cucumbers in the max! cucumbers drink a lot of water so a large water reservoir is key
Setting Up the LetPot LPH-Max
Getting the LetPot LPH-Max up and started was really simple.
It’s mostly pre-assembled.
One of the main reasons I love these hydroponic machines is they do all the hard work for you – and that includes starting a garden.
Simply put the grow deck onto the machine, fill the tank up with water, plant your seeds and plug in the garden to a power outlet.
Really… that’s it!
You can get started in under 10 minutes.
Using Your Own Seeds
Note: You will have to buy your own seeds.
The LetPot Max does not come with seeds. I buy all my seeds online, from heirloom seed companies like:
I often get asked where I buy my seeds so I also put together a couple in-depth guides.
This post is a list of all my favorite online seed companies.
It covers where I shop, how to get the best price on seeds and which seed companies are best for specific varieties.
This post is a guide to seed buying for hydroponic gardening.
It details my go-to seed companies, the key words I use to make sure a plant variety will work for indoor gardening and some of my favorite varieties.
LetPot LPH-Max
Now that I’ve used the LetPot Max intensively, let’s talk about the pros and cons!
Pros
There are lots of really impressive features that are available with the Max model.
I like it the best out of all of the company’s other indoor gardens, because of these advanced features.
Here are some of my favorite aspects:
Growing Peppers Indoors in the LetPot Max
Here’s a harvest video of colorful, fruity Biquinho peppers that I grew in the LetPot Max:
Size
This is a medium large hydroponic garden.
While there are lots of small countertop gardens on the market, there aren’t nearly as many options in the medium to large category.
The Letpot Max is like the ‘goldilocks’ of indoor hydroponic machines – small enough to still sit on a countertop but large enough to grow sizeable fruiting plants.
I also appreciate how the garden is designed.
It has a squarish rectangle design that fits an impressive capacity of both plants and water.
You can grow up to 21 plants and the tank holds 7.5 liters.
I find that I don’t need to water this garden nearly as often as my other indoor gardens, thanks to the large tank capacity.
Read more: My Complete Indoor Garden Setup
LCD Screen
I always prefer my indoor gardens to have an LCD screen that displays the time, the on/off hours, # of days the garden’s been running, and the water level.
If you have multiple gardens, it’s really nice to sync them all to run at the same time.
Most of the smaller, entry level indoor gardens don’t have the LCD screen (I guess because of cost) and will automatically run when the electric cord is first plugged in.
This makes it very annoying if you ever have to unplug the cord or if you have multiple gardens and want them to all turn on/off at the same time.
So I always prefer indoor garden systems with an LCD display and light customization abilities.
I wish it had an easy on/off button for the lights but overall, the LCD touch screen is a really nice touch.
Mobile App
Letpot has a great, easy to use mobile app where you can further customize the garden’s settings.
It allows you to easily view all your gardens (if you have more than one) and adjust the light on/off times, light brightness, light modes and more.
I add all my LetPots to the mobile app so I can easily see them all in one place.
But, the mobile app isn’t necessary to download.
If you don’t want to add another app to your phone, no worries. It’s just a nice, free bonus.
Automatic Watering
A really unique feature about the Max is its automatic watering mode.
The garden comes with tubing that allows you to connect the machine to an external water reservoir.
This way, you don’t have to manually refill the garden with water.
You will need a separate bucket, container or water line to tap into, so personally I don’t really use this feature.
(The Max holds a decent amount of water on its own – 7.5 liters!)
But the automatic watering feature is really nice to have.
It would be especially handy for anyone who travels often, or simply hates to have to re-fill on a weekly basis.
Inside the garden grow bowl, there’s also a little divided compartment where you can pour nutrition.
The garden will automatically drip nutrients into the reservoir on a schedule, so that you also don’t have to worry about topping up nutrients.
This makes the Max a great garden for those who like to ‘set and forget’ it and be really hands off.
Read more: The Best Hydroponic Nutrients
growing fruity brazilian peppers in the LetPot Max
Cons
I really like the Max so it’s hard to name many cons.
Water Hole
My main complaint is the size of the water hole – it’s very small.
All of the Amazon indoor garden brands like to slot the water hole off to the right hand side, and they make the opening very small.
There’s also a strange bar underneath it so that if you pour in water too quickly, it splashes out all over the grow deck.
I’d prefer a large water opening in the center of the machine, like the Aerogarden design.
But that’s a very minor complaint!
Sometimes I just lift the whole grow deck and pour water directly into the tank.
The Indoor Gardening Guidebook
I wrote down everything I know about Indoor Gardening!
My exhaustive 175+ ebook takes you from black thumbs to expert indoor gardener in one, easy-to-read digital guide:
By the end of it, you'll know exactly how to grow your own pesticide-free produce (no matter the size of your home)!
Take a look inside the book here.
Light Height
My second criticism is the way the company markets the light height.
The product description states the LED height at 21 inches, but they’re including the grow bowl in the height measurement.
The actual available height for plants is 18 inches.
Since the light height is a limiting factor for how large plants can get, I always look for indoor hydroponic machines with as tall a height as possible.
18 inches is still decent, but it would be great if the product had a 24 inch light height.
Additional Accessories
Currently, I’m growing 2 types of cucumbers in my Letpot Max (this pickling variety and this mini variety).
One accessory that’s sold separately is Letpot’s trellises.
If you’re growing any type of plant that needs support (beans, peas, cucumbers, some tomato types), you should pick up their trellis system.
It’s modular and stackable, so you can add multiple trellis tiers and train your plants to grow upward.
LetPot has trellis add-ons for both their Senior and Max gardens.
Letpot Max Trellis System
When I first grew cucumbers without the trellis, the vines were growing all over the place, in every direction.
I tried to keep things tidy by wrapping them in a circular pattern, but it was definitely getting very messy and I wasn’t getting as many cucumbers as I wanted.
Once I started using the trellis, the plant had more room to grow.
I also had a better visual on the developing flowers and fruit, which enabled me to improve pollination and grow more cucumbers.
Highly recommend checking out Letpot’s extra accessories!
Letpot LPH-Max Review
Overall, I’m a huge fan of the Letpot Max.
There aren’t many hydroponic machines in the ‘medium’ size category that can be used for all different growing purposes.
I initially used the Letpot Max to seed start.
With 21 slots, it acted as a seed starting tray to grow tons of plants all at once.
the Max is super versatile – I used it to start seeds for all my indoor gardens, then when that was done, used it to grow cucumbers
I used it several times to populate all my indoor gardens, as well as to start seeds for my vertical tower garden, the Lettuce Grow.
Now that all my machines have plants growing, I refocused the Max to grow more veggies.
So you can use it 3 ways – to start seeds, grow small plants and for large plants.
It’s a unique all-in-one machine!
Pickling Cucumbers that I Grew In the LetPot Max:
And I turned my LetPot Max cucumbers into easy quick pickles!
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This review was super helpful! I’m considering getting the Letpot LPH-Max for my garden, and your insights really highlighted its features. I love the idea of it being an all-in-one solution. Can’t wait to try it out!
I am also looking into starting indoor gardening and I am interested mostly in growing tomatoes. Do you have any experience to share on this?
Thanks,
G.