DIY indoor hydroponic tomatoes have caught my attention recently, thanks to my husband. He was browsing on the internet and somehow came across some ebooks on hydroponics, and he bought them for me. Seeing as the soil here in Tennessee (at least in my yard) is clay and rock (yikes!) I had planned on growing tomatoes in containers. Well, hubby thought that if I planned to do containers, why not hydroponics?
No lugging home bags and bags of potting mix, compost, perlite, etc. and getting dirty in the process. (I had calculated I would need something like 10 bags (40 lbs each) of potting mix, another 10 to 15 of compost, plus the perlite, vermiculite and such to start from scratch up here.)
Hydroponic Ebooks and Their Effect
So, I read the ebooks, and it didn’t seem to be very feasible for me. All those pumps and airlines, flowing water, misters and so on. The garden area I have picked out has 1) no water and 2) no electricity. The nearest hose bib is about 50 or so feet away, and there are zero electrical outlets.
Just for fun, I went onto Amazon and looked up some hydroponic systems, and I wasn’t overly fond of some of the full-blown systems. They were actually less expensive than I thought they would be, but they seemed to be more for leafy veggies and herbs than tomatoes, peppers, cucumbers, etc.
Then I came across something very, very intriguing.
Enter the Kratky Method of Hydroponics
Hmmm, here was something interesting! Dr. B.A. Kratky of the University of Hawaii came up with a hydroponics system that required no pumps, no circulating water, no mister, no electricity. The setup described seemed perfect for growing just about anything…like tomatoes and peppers and cucumbers. Lettuce, herbs, flowers, squash — a multitude of plants.
Wow — no electrical outlets needed, no misters, no hoses! It’s a “set it and forget it” system.
I’ll write up a whole post about the Kratky Method (as it is now known) and how it works, but it seems to be very easy to set up. Pick a good sized container, cut some holes in the lid, grab some net pots and fertilizer, add water and you’re good to go. (Yes, there is a little more to it than that, but it’s a broad outline)
Growing Tomatoes in a DIY Hydroponic Setup
It’s still Winter, and here in Eastern Tennessee it’s still pretty chilly at night — in the 30s, and the days are in the upper 40s. But it’s not too soon to start seeds! And I have decided to run a test for growing some micro-dwarf tomatoes indoors using a very, very DIY (and very inexpensive) setup. Like a gallon water jug, some fertilizer, a net pot and good lighting. Oh, and tomato seedlings!
Growing Indoors – and a Test!
The test will also be comparing growing the tomatoes in a hydroponic setup versus a grow bag. I’ve picked the tomato variety Red Robin since it’s a micro-dwarf (only getting 8 or so inches tall).
I’ll have the hydroponic tomato plant in a 1-gallon water jug, and the other plant in a 1-gallon grow bag with a potting mix. They will be growing side-by-side in a south-facing window, and I will also have some supplemental lighting.
Container Gardening Too
Not to fear, I will still be doing some regular container gardening with my grow bags. I’ve had plenty of experience with grow bags, and none with hydroponics. I want to make sure that if I do something wrong with the hydro, I’ll still have some plants growing the usual methods! (Gotta have some homegrown tomatoes, in any way I can get them.)
So look for more posts on the Kratky hydroponics setup, how the plants are growing, and tomatoes in general. It should be a very interesting gardening year!
Growing tomatoes indoors is something new I am trying out. Starting seeds indoors, sure, but actually growing the plants inside and harvesting the tomatoes? With my new location, it’s something I’m dying to try!
Tomatoes for Growing Indoors
I won’t be able to grow a full-sized tomato plant indoors, but I should be able to grow a mini tomato plant; something that is no more than about 12 inches tall. There are some where it’s claimed they can grow in a 4 inch container — but I want more tomatoes than something that small could give me. Some good tomato varieties that are in the 10 to 12 inch size range are Red Robin and Tiny Tim. Since I already have seeds for Red Robin, I think that’s what I’ll plant.
What’s Needed for Growing Tomatoes Indoors
Tomatoes need a place to live (a pot), light, water, soil and food (fertilizer).
- Light: Obviously, good light is necessary. While I do have a south-facing window, I don’t think it will be enough to support a good harvest. I’ll invest in some grow lights to supplement the light I do get.
- Pot/Container: My tomato plant needs a place to live, but I don’t have a ton of space. I’m going to go with a 1-gallon self-watering container (8 inch diameter).
- Water: Easy enough, especially with a self-watering container.
- Soil: I’ll need something that drains well, but also helps to hold moisture. In other words, I don’t want the water to just go through the pot before the roots can get the moisture — nor do I want the plants to have so much moisture that they have wet feet! A mix of potting soil, perlite and some sphagnum moss should give me what I need.
- Fertilizer: I think I can use the same fertilizer I use on my african violet and streptocarpus plants, which is a mixture of Miracle Gro for Orchids and Miracle Gro for Roses. I may be able to add some Sea Magic fertilizer, but because the plant will be indoors in closed room, fish emulsion is not an option. 😉 The fertilizer will be 1/2 strength, every other time I water.
Well, the tomato seedlings are missing! I’ve been itching to plant some tomato seeds, so this will be my chance to try out my new seed starting trays and heated seed germination mat.
Just for fun, I think I will also try to grow a Red Robin plant outside as well, and see what the difference is. Well, I’m sure it will grow better since it will be in a 3-gallon container, but the question is how much better?
Annual Versus Perennial
First, let’s quickly review what perennial means, as well as what annual means, when it comes to plants.
- Annuals are those plants which live for a season. A season can be a couple of months, or perhaps up to 8 or so months. It refers to how long your growing season is, and what kind of weather your plants prefer.
- Perennials are plants which live for more than one season. If they appear to die due to (for example) frost or excessive heat, they will come back on their own once their preferred weather returns.
That’s a high-level difference between annual and perennial plants. Now let’s talk tomatoes.
Are Tomatoes Perennial?
Sadly, tomato plants are annuals. Now, that isn’t to say they can’t have a really long growing season, if they have the right environment. And if grown in a perfect environment (like a special greenhouse), it’s possible that some indeterminate tomatoes can last a year or more.
This applies more to cherry tomatoes, though, than tomatoes with larger fruits. Cherry tomato varieties are especially known for being vigorous growers and producing lots of fruits over a longer season.
Growing Indeterminate Tomato Plants as a Perennial
OK, so let’s say you have a pretty perfect environment. Not too hot, not too cold, humidity just right, plenty of sun. Plus, not exposed to tomato plant diseases and with few or no insects that love to munch on tomato plants. Oh, and plenty of room, because indeterminate tomato plants can get mighty big.
(Now you see the dilemma.)
It seems like the best environment would be a greenhouse or in an enclosed sunroom. Tomatoes like their warmth, but they don’t like high temperatures. And they don’t care for cool weather, at least not during the day. They do like moderate humidity, and good air circulation. Plus — 6 to 8 hours of direct sunshine per day, or the equivalent in bright grow lights.
If you can also control exposure to tomato diseases (many of which have to do with soil and wind-borne contaminants), and regularly patrol for tomato-loving insects, you’ve gone a long way to giving your tomato plant a longer life.
Now, let’s talk about the tomatoes themselves — because why grow the plants if you don’t plan to eat the tomatoes!
How Tomatoes Fruit on the Plant
Tomatoes set fruit starting with lower branches, and proceed upwards on the plant. Once a branch has set fruit, it’s not going to flower again once the fruit has been picked. And this means that your plant needs to grow taller in order to continue setting fruit. Alternately, it will need to bush out to continue fruiting.
If you plan to grow your tomato plants indoors under grow lights, they will need to have good light all over the plants as it grows taller and/or wider. This may mean multiple grow lights.
Growing Tomato Plants
By now you can tell that the answer to the question of “are tomatoes perennial” is that they are best grown as the annual that they are. If you plan to try to grow a tomato plant as a perennial, though, your best bet is with an indeterminate cherry tomato plant variety.
What homegrown tomatoes are in store for me in 2020? As I mentioned in my previous post of my new location, I’ve got a whole different growing style to get used to.
Instead of two short growing seasons, I have one longer one. If I am lucky, I’ll be able to do a little succession planting. The humidity up here isn’t nearly as bad as S Florida, even though I still will get days in the 90s come August. My season starts in early April, so I’m lining up all my supplies now.
All that being said, what tomato varieties do I have planned for the 2020 gardening season? Here’s what I want to grow.
Tomato Varieties Planned for 2020
I’m going with all new (to me) varieties, with one exception. All are either heirloom or open-pollinated, so I can save seeds if I like. And for a change, I am planting some dwarf tomatoes! Here is the lineup:
- Dwarf Arctic Rose: Determinate, pink, early-season. Regular rugose leaves. Fruits average 2 to 5 ounces.
- BrandyFred: Indeterminate (dwarf), purple, mid-season. Potato rugose leaves. Fruits average around 10 ounces.
- Dwarf Pink Passion: Indeterminate, pink, mid-season. Regular rugose leaves. Fruits average 8 ounces.
- Dwarf Bendigo Blush: Indeterminate, pink, mid-season. Potato rugose leaves. Fruits average 1 to 2 ounces.
- Red Robin: Determinate, red, early-season. Regular rugose leaves. Fruits average 1 ounce. Not a dwarf so much as a tiny micro-determinate — tiny as in maybe 10 inches tall. This is the one variety I have grown in the past, so I’m looking forward to seeing how it grows up here.
- Tennessee Yellow Cherry: Indeterminate, yellow, early-season. Regular leaves. Fruits average 1 ounce per tomato – supposed to be very prolific. And since I now live in Tennessee, it seemed appropriate. 😉
- Vorlon: Indeterminate, purple, mid-season. Potato leaves. Fruits average 6 to 8 ounces. I get a kick out of the show “Babylon 5”, and this was supposedly named after a character on the show. I just couldn’t resist, and purple tomatoes are generally pretty flavorful.
Three unusual varieties I’ll be growing are:
- Blue Beauty: Indeterminate, blue, early- to mid-season. Regular leaves. Unknown average size. I’ve not grown a blue tomato as yet, so this will be my first. The “blue” is due to anthocyanin, which is more of an indigo-purple color.
- Alice’s Dream: Indeterminate, blue/striped, mid-season. Regular leaves. Unknown average size. I have to admit, this one intrigues me. More anthocyanin, so it’s a “blue” tomato, but ripens to what looks like a striped tomato. It’s supposed to be beautiful and tasty!
- Girl Girl’s Weird Thing: Indeterminate, striped red/green, mid- to late-season. Regular leaves. Unknown average size, but appear to be medium. The name drew me in, and the striped red and green was fascinating. Supposed to be very tasty.
Although Blue Beauty, Alice’s Dream and Girl Girl’s Weird Thing have unknown average sizes, from the photos I’ve seen I guess that between 6 and 10 ounces seems reasonable. I know that “tasty” can vary from person to person, so when I eventually review these varieties, I’ll have to compare them against some well-known varieties for comparison.
I’m really excited to be growing in this new location, and with these new-to-me tomato seeds. I look forward to sharing my progress and photos of the garden and tomatoes.
Happy New Year! My homegrown tomato garden is celebrating the new decade in a new location. I don’t live in S. Florida anymore — I am in eastern Tennessee. My normal growing pattern is topsy-turvey; no Winter planting, but I do get to grow through the summer.
I’ve gone from 10a for a plant hardiness zone to 7a. Which basically means a chilly winter with plenty of freezes, and a last expected frost date in mid-April. But interestingly so far, with all the frosts we’ve had so far this Fall and Winter, our yard doesn’t seem to collect frost; across the street does, though. Talk about being in a micro-climate!
Different State, Different Soil for the Tomatoes
I’m used to sandy soil, which is fairly easy to dig up. I had a lovely spot planned for the garden for my homegrown tomatoes; I was going to rototill it, put down plenty of compost. First, I decided to plant a few daffodil bulbs nearby. Imagine my surprise when instead of an easy to dig soil, I found compacted clay and rocky soil. Argh! (I barely got 10 bulbs planted before I gave up.)
There goes my plans for rototilling the garden. I’d have to put down so much compost and perlite that I’d be rototilling for weeks, and spend many hundreds of dollars. With those plans out the window, I’m turning to container gardening.
Container Tomato Garden For 2020
Fortunately, I’ve had a lot of experience with container gardening my tomatoes. The approximately 12 x 7 foot garden plot will be festooned with 3-gallon, 5-gallon, 7-gallon and 10-gallon grow bag containers. I have some room to expand a little to the northeast of that plot, maybe a little more across the walkway.
Right now it doesn’t look like much; well, it is the tag end of December. I still have to pull up one bush that is in my way, but I think it’s small enough to not give me too much trouble. But, it faces southeast and is protected by the house on 3 sides, giving it another micro-climate; I may be able to put out at least some of my plants a week or so before the last expected frost date.
Well, this should be interesting, to say the least! My growing situation is much different from where I gardened for some 20 years. I am very much looking forward to see what kind of homegrown tomatoes I can successfully garden here, and share the results with you. 😀