The Cheap Vegetable Gardener

Christmas light LED grow box – Update #1

16 years ago indoor growbox, indoor seed starting, LEDs, wondersoil

I have been pretty impressed with the results of the Christmas lights LED grow box so far. I did have some preconceptions that I may need to double the lights or upgrade the LEDs, but so far the plants look healthy without white leggy stems, though still need to wait until the true leaves come in. As you can see in the picture above I have quite a selection of pots reused from previous years. The one exception are the newspaper pots which I discovered last year and am definitely a fan of.  You can also see from the gross white stuff that my grow box probably could use a fan or at least prop a corner open.

Here is a picture of one of the cucumber plants up close.

My experiment is being conducted in the LED grow box so for its update, looks like is in the lead but hard to say with just germination occurring.

UPDATES:
Christmas light LED grow box – Update #2

Tags: cheap, grow lights, growbox, led, outdoor plants, vegetables

Using WonderSoil for seed starting

16 years ago cucumbers, fertilizer, indoor seed starting, vermicomposting, wondersoil

I had great results using coconut coir last growing season it was great to work with, retained water great for young seedlings, and was economically priced.  The only challenge was actually finding some to use this year.  No luck in local stores, last year I only could find a single block in one hardware store.  Online there are plenty of locations that sell them, but unless you have a need for a couple metric tons, the cost of shipping can be more than the the product itself.

Finally, I found a solution to my problem WonderSoil  Their main product line consists primarily of the same core component but they sell it in many different convenient sizes for various uses.  One great feature of the product is it expands up to 12 times its original size.  For someone like myself that does not have the space to store bags of peat/potting mix around my already full garage this is a great feature.  You can check out all of their products but the ones that felt matched my growing needs were the following:

• Shake, Water, and Plant — 1/2 inch mini wafers that can be added to any of your pots.  In my case I underestimated the expansion of these little things and made a little mess and it overflowed on my table (apparently 3 was the magic number not 4)
• The Tube — There are larger wafers made specifically for 4 inch pots, in my case this would be newspaper pots
• Reground Wafers — This is basically a loose version available in 2 or 5 lb bags.  This is a more economical option which I will plan on using when doing larger seed trays.

For Christmas I got indoor seed starting kit which came with pots/seeds/peat pellets.  I decided this would be a great opportunity to do a little side by side comparison.  From the start I was WonderSoil seemed like the obvious winner.  After adding a little water, it fully expanded in just a few seconds and was fluffy and ready for me to drop a seed in, the peat was a swampy mess.

Peat pellets Left, WonderSoil Right

After a few minutes and fluffing with a fork the peat was ready to planting.  I put cucumber seeds in both peat and WonderSoil pots and I will provide some updates on how things progress on my little experiment.

After the WonderSoil had some time to settle in my cheap LED grow box I did see some strange formations appear in the soil.

I little concerned I went back to their product and I believe this is their “water saving polymers” in action which I would assume is some sort of gel crystal which is supposed to save up to 50% water.  They also boast about use of worm castings which I am definitely a fan of as well as addition of a balance of various micronutrients.

I will have to wait and see if the product produces as well as it claims, but I must say I am definitely impressed at this point and have high hopes for WonderSoil for this years seedlings.

UPDATES:

Christmas light LED grow box – Update #1 (WonderSoil)

Tags: cheap, compost, garden seeds, growbox, led, outdoor plants, vegetables, worms

Computer controlled grow box – Part 1

16 years ago cheap, computer, electronics, indoor growbox, PC thermometer

The Idea and Design

My PC Grow box was very effective though it did have some shortcomings along with my desire for tinkering caused me to create a new version code named “Project Everbearing” after the test subjects for the project, several Everbearing strawberry plants I propagated from my garden last Summer/Fall.  The specific shortcomings I wanted to overcome were temperature control and limited size.  My grow box has to live in my garage so on cold nights the temperatures can fall low enough to kill my summer seedlings (tomatoes/cucumbers)  Size is an easy fix just make it bigger though it is more difficult to keep a larger grow box warm and still well lit.�

My solution to both of these problems was the addition of a computer to the system.  First computers generate heat, using this along with computer controlled fans and incandescent lights (heater)  allow me to regulate the heat to my desired levels.  This is the point a normal person may have just stopped, but I am far from normal and decided a few more features, which I will explain more below.

The Structure and Insulation

First comes the structure, upon inheriting a set of shelves from my sister, we ran out of room for some of our existing storage shelves (see above), though we used the buckets to store loose toys on our new shelves we had the structure of the old one sitting in the garage for some time.  After many passes by in the garage not knowing what do do with this shell, it finally came to me that this would be perfect for my new grow box, (Reduce/Reuse/Recycle) in action.  The only customization required was the removal of a couple of the wooden dowels and I was ready to add some hardware.  Of course you could do the same thing with an old bookshelf, cabinet or just with construct your own frame with a 12”X1”X8’ foot board cut in two along with two 1”X1”X8’ pieces of lumber cut into two.  Screw one 1”X1” in each corner and should should have a pretty solid frame.  For the top I used pegboard mainly because I bought a 4’ by 8’ sheet when I only needed half of it but worked really good to use zip-ties to secure various components and provides decent airflow between the computer and growing areas.

Second comes insulation, after some not so careful calculations and measurements I determined I could cover the 3 exposed areas with 2 sheets of 2’ by 4’ sheets of insulating Styrofoam.  I glued and taped (duct tape of course) the Styrofoam which was cut using a utility knife and straightedge to cut to size making sure I made the top straight and flush.  I then created an exactly copy of the other side and one more piece for the top.  Using a long strip of duct tape I created a hinge for the top and glued side of the box.  The last piece I simply fit into place using a tool box to ensure a tight fit but also allows easy access to plants when needed.

The Lighting

I went cheap on the lighting taking from the success of the PC grow box I decided to go with a similar setup using $2.00 home depot wired sockets hooked up to an couple old computer power cords.  I went with two 24 watt CFL bulbs and one incandescent bulb.  Though the incandescent is not as efficient and the CLFs it does provide a full spectrum of light and a little extra heat which the box can use in the many times cold garage where it lives.  The CFLs and incandescent exist on two separate circuits so they can be controlled independently by the software.

The Software — Grow box brains

Now I know all of this could be done with a Basic Stamp or Arduino pretty easy, but I wanted the ability to track history and have a decent user interface to look at, so I wrote a windows form application using C#.  To cover the basic functionality of temperature control I used the parallel port outputs hooked up to the computer’s parallel port to give the software the ability to turn the lights on and off.  By configuring a “sunset” and “sunrise” time which I am in complete control over the lights will turn on and off as appropriate.  I added some logic to ensure the plants stay at a comfortable temperature (thresholds configurable) by turning on the incandescent bulb when it is too cold and an exhaust fan when it gets too hot.  In order to allow the computer to know these temperatures I used a PS2 controller to create two temperature sensors one for the area the plants are growing and another for the top area where the CPU resides (computer was too old to have onboard temperature sensor)

My daughter thought it would be cool if we have some sort of automatic watering system.  I agreed, so I added a moisture sensor and created an algorithm to periodically check the moisture level and activate a water pump to add water until it reaches the specified moisture level.  I still need to buy and hookup the pump but coding portion is complete and tested.

I live in the Pacific Northwest it rains a lot and can get cold in the evenings and I don’t want to trek out to check on my plants.   solved this by adding the computer to my Wi-Fi network now I can take look at them by connecting to the machine wirelessly and see how they are doing through it’s webcam.  I also take periodic pictures of the plants so I can create cool time-lapse videos of progress like the one below.  I also have the ability to browse through pictures taken at specific time periods.

Finally to store all of this data I installed SQL Server 2005 Express (free) which allows me to track historical data of the conditions and images over time.  If you have data, you definitely need some graphs.  Being too lazy to do this graphic work I leveraged ZedGraph (free) to allow some visual tracking of temperatures and moisture content.

Features for future versions (Beta 2?)

• Finish automated watering
• Add automated red LED lights for flowering stage
• Install LCD Panel
• Make box look better (real door which does not require tape to open/close)
• Create single USB controller for lights/sensors
• Better/additional camera

Video of grow box “booting” up, personally I like the flashing lights when the computer sends signal through the parrallel port.  If you are old enough to ever have a printer that used a parallel port this is when it would make its annoying sound letting you know it was alive.

Updates:

Computerized Grow Box Update #1

Tags: arduino, cheap, garden seeds, grow lights, growbox, led, outdoor plants, strawberry plants, tomato plants, vegetables

Cheap grow box with LED Christmas lights

16 years ago indoor growbox, LEDs, seed saving

I have one major problem last year with growing seedlings, running out of space.  I grow many different types of plants with various germination/growth rates and varied start dates.  This forces me to make sacrifices for placement of my movable light and eventually forced to move some plants outside earlier than I should.  The light needs to be close to the newly emerging seedlings, but can’t be burning the more mature plants growing into it.  My solution to this problem is a LED storage container grow box.  With this I will have a portable seeding area and since LEDs practically emit no heat the plants can literally touch the lights without problems.  At that time I move them to a larger grow box where it can continue to grow and start more seedlings.  I thought about creating my own LED matrix and buy individual LEDs and solder them together, but that sounded like a lot of tedious work and soldering, which I most likely would mess up.  Given it was after Christmas and LED lights were really cheap, this seemed like a good possible solution.

Materials cheap grow box with LED lights:

1. 3 gallon Rubbermaid tub
2. 1 string white or blue LED Christmas lights (50% off after Christmas)
3. Drill with (1/4 in drill bit)
4. Hot glue gun (may be optional)

Take a look at the number of lights on your string (mine had 60) then by measuring your tub figure out how you want to create your matrix.  Best to double check your measurements as you can see below I miscounted and only planned out 55 holes which I improvised and added 5 more after the fact.  You can also combine multiple strings if you want, given the low wattage you can string dozens of these together if you really wanted.

Drill holes that will provide tight friction fit to the tub, for my lights this was 1/4 inch drill bit but for yours this may be more or less, I would recommend starting smaller and increase until you find just the right fit.  Once you have all your holes drilled fit each of the LEDs into the holes you drilled some of the connections between the bulbs will have a solid section in between (resistor) so depending on the spacing might be best to make this one diagonal of the previous light to make it not as tight a fit.  If you have some lights that just won’t stay in, apply a small dab of hot glue between the bulb and the lid.  This may diffuse the light a little  but very little intensity at the base so light loss should be minimal.

Last plug it in and check out your cheap LED light.  You may want to shake it upside a couple times and find any loose lights while your glue gun is still hot.

Now some of your might be thinking (including myself) are these lights intense enough to allow adequate vegetative growth?  I did take a look at the LED matrix with my homemade spectrograph and it did show a high intensity of blue wavelength with minimal on red and orange/yellow/green so for this small space it may just work.  I am going to test it out on some guinea pig plants now and if I start seeing tall spindly growth I can easily switch out the current while LEDs with some ultra bright blue LEDs by simply pulling out the socket, swap out old LED (save some other project), replace with new LED, trim excess terminal wire, and push back into the socket.  Below is my proof of concept for this as long as the voltage/amperage is the same the circuit will continue to work, below is my proof of concept.

I also purchased a couple of red LED Christmas lights for plant flowering stage but have a couple months before I need to pull those out.

For build cost, this small storage container costs less then $2.00 and with the 50% off sale on Christmas lights at $3.00 I have a cheap grow box with full LED grow lighting for just $5.00 and about 15 minutes of assembly.

UPDATES:

Christmas light LED grow box – Update #1
Christmas light LED grow box – Update #2

Tags: cheap, garden seeds, grow lights, growbox, led, outdoor plants, vegetables

The most profitable plants in your vegetable garden

16 years ago cheap, cilantro, garlic bulbs, organic, seedling, seeds, vertical gardening, winter garden

Many vegetables can be expensive to purchase by growing the most expensive vegetables in your garden and buying the least inexpensive vegetables at your grocery store you can easily help drop your food budget.  This especially important for people like me with very limited space to grow everything that I consume.

It may be impossible to put a price on the satisfaction of bringing in a basket of produce fresh from your garden.  As well as the enhanced flavors from having truly fresh produce from your garden compared to that of your local supermarket.  Though when I was harvesting my potatoes this summer with my daughter I did have the thought, Would it have been smarter for me to grow something else in this space?  I estimate out of the 4-5 square feet I used for these plants I probably got about $4-5 worth of potatoes.

I did a little research first to determine yields of various plants per square foot and secondly what the value (organic supermarket prices USD) of the yielded produce at harvest.  Given I am a city dweller with a fairly small footprint for my vegetable garden (about 30-35 square feet) making decisions on what to buy at the supermarket and what to grow in the garden may be a huge money saver with just a few dollars invested in some seeds for your vegetable garden

Now from the results below you can see the winners for the most produce value per square foot are many of the leafy green vegetables/herbs (cilantro, lettuce, chives, dill, Swiss chard) next comes many of the larger vine plants (tomatoes, squash, pumpkins, peas) with many of the root plants taking up the rear.  Now much of this makes sense where many of the vine plants grow on trellises and are allowed to spread, which I guess is sort of cheating the square foot rule but I will let it slide.  Compared to the root plants whose production is entirely dependent on the space allowed in square footage they have to grow as well as these are normally inexpensive produce items to begin with.

Sources: http://www.mcgoodwin.net/pages/ppatch.html for plant yield information, http://shop.safeway.com for current produce prices

Now even with this information I will still plan on growing some onions and garlic since I more than likely would be forced to use dehydrated alternatives due to being too lazy to drive to the supermarket to buy fresh varieties.  Though I may be adding some more herbs/greens to my garden this year.

One important thing to remember is you still have to eat the vegetables, throwing $20 worth or arugula or cilantro into the compost bin is not exactly a sound investment.  You can also get higher yields by growing vertically, but don’t forget those tall plants produce a larger shadow so you may still need some extra ground space to support these alternate growing methods.

So go out and get some cheap vegetable seeds (or in many cases free) and plant some profitable vegetables in your backyard/patio garden this spring.

     

Tags: cilantro, compost, garlic bulbs, herb garden, organic vegetables, outdoor plants, pepper plants, tomato plants, vegetables

Make your own paper seed packets (origami)

16 years ago seed saving, seed storing

When I posted about my adventures in saving onion seeds I mentioned the desire to purchase some small envelopes to hold the seeds. jimmycrackedcorn promptly responded with a comment scolding me for my lack of cheapness. Which I shamefully have to agree completely and took his advice and decided to make some of my own.

I followed the directions from the ICPS Seed Bank though I did do a little improvising to make the packets a little smaller and I got lazy on my folding so I have provided the cheap/lazy directions below.

Step #1: Start with a sheet of paper and fold down the middle, this will allow two seed packets per sheet of paper:

Step #2: Use scissors to cut out the individual triangles which will be come your seed packets

Step #3: Fold one corner one third of the way across the paper

Step #4: Insert the other corner inside the fold and fold flat

Step #5: Open top and pour in seeds, add a label, and fold over top

I like this design since it is easy enough that even I can do it, it naturally has a funnel to pour in/out seeds, and is fairly compact which is good since my pickle jar seed holder in my refrigerator is getting pretty full.

Tags: cheap, garden seeds, outdoor plants, vegetables