The Great Thing About Hoop Houses

The last few days have been relatively cool in Denver. 60s and 70s for the most part and more of the same for the next few days. The great thing about growing a pumpkin in a hoop house is lower temperatures really don't matter. It is 11:00 right now and it is a perfect 84 degrees in my hoop house with an outside temperature of 66 degrees. Windy days are also not a problem for plants growing in hoop houses. The wind goes sailing by with just a gentle breeze coming through the hoop house. Colorado growers have talked about the challenges of growing in our enviroment for years. I believe the three main things that cause us trouble is lack of humidity, big and quick temperature changes, hail storms and high UV light. The hoop house kind of evens things out in many ways. In my hoop house, with a 75 watt bulb in it at nigth (with the light shielded from the plant), the temperature usually doesn't get lower than 53 degrees at night, the humidity is higher because the plastic holds the moisture in, the plastic cover protects the plants from smaller hail and I would believe at least some UV rays would be filtered out by the plastic. The biggest challenge with hoop houses is not letting it get to hot. On a cloudy day where the sun breaks through the clouds the temperature can easily rise 10 degrees in 15 minutes. In an hour or so the temperature in the hoop house can easily get over 100 degrees. I have a wireless thermometer in my hoop house and I work from home so I can easily watch the temperature all day and modify how much I open the hoop house to control the temperature.

Update (2:00pm): Pea sized hail just hit and the hoop houses held strong so no damage to the plants at all. At least one item on my least has held true to this point. Almost a year ago my plant got hit by hail and I lost about a foot of the main vine. Mitigating risk is a big part of growing big pumpkins.

Photos from the Patch

The following are the latest pics from the pumpkin patch. Gave them some nitrogen today so hopefully the next group of pictures will show a burst of growth.



1566 Rodonis



793 Van Hook



1350 Starr



1154 Doucet

Main Vines are Getting Ready To Run

This time of year can be kind of boring in regards to pumpkin growing. Thad Starr said it well in an email last week when he said, "I hate this time of the year. You wait and anticipate it all winter, finally get to start your seeds, then schreeeech! Wait and wait for the little bastards to grow. They are so slow to start!" The 1566 contines to do fairly well. The 1350 had very little growth for about a week so I planted a back plant next to it and it got the message. In the last two days it grew two new leaves and there are signs of life in the plant again.

The warm weather is really starting to help the growth too. I've been giving the plants a little extra water as well to help them along.

Welcome First Time Giant Pumpkin Growers

So you've decided to go after it this year. To grow a really big pumpkin. Congratulations! Growing pumpkins can be a lot of fun and a great family activity. Below are some links to previous posts I have made about pumpkin growing. Feel free to browse through them and maybe you can find something that will help you in your quest of the Great Pumpkin. If you are looking for really good seeds please visit http://www.coloradopumpkins.com/.

Seeds
Soil Preparation
Fertilization
Watering

My article in the Arvada YourHub made it to print today. If you would like to read the article you can find it here.

Photos of Pumpkin Plants in Hoop Houses

The following are pictures of the pumpkin plants in their hoop houses. The 1566 Rodonis was planted 4 days before the 1350 Starr and 793 Van Hook (which the kids are growing) but both of them have been a little slower getting going.

1566 Rodonis

1350 Starr

793 Van Hook

Pumpkin Plant Status Update

Of the nine seeds I planted only one didn't germinate and that was the 1450 Wallace. Two other plants germinated but don't look like they are going to make it and they are the 1269 Hunt and 1363 Werner. Of all the plants the 1566 Rodonis is doing the best right now. Really rapid growth. It is followed by the 1350 Starr which had a bit of a slow start and is now the second biggest plant and the 793 Van Hook. The 1154 Doucet, 1004 Mohr and 1187 Hunt are also growing and look to do well. I only have two full-size spots and one small spot to grow on. My two children will grow on the smaller spot. My wife will belittle all of us during the process (we call her the pumpkin widow). The plants will be planted outdoors in the hoop houses late tomorrow afternoon. It looks like the 1566 Rodonis, 1350 Starr will go into my patch and the 793 Van Hook will be grown by the kids. If you are interested in the three extra plants please let me know. They all have fantastic genetics and I would hate for them not to be grown. I have had a couple of people already ask me for plants but right now expect to have one extra.

From what I have been able to find only two 793s have been grown so far and only one was a real attempt. The 793 Van Hook is 1041 McKie x 1450 Wallace. The 1041 grew the second biggest pumpkin of all-time and is well known for going really heavy. The 1450 Wallace grew the 5th biggest pumpkin of all time and tends to go heavy as well. The 793's progeny have had a nice orange color which I think the kids will really like.

The 1566 Rodonis had an amazing first year with 11 pumpkins over 1,000 pounds. In my opinion it is one of the top 5 seeds right now. The 1566 grew the largest damage pumpkin last year and is one of the 5 biggest pumpkins ever grown. It sometimes throws a great orange color. From growers I have spoken to that grew the 1566 last year they all said it was a great trouble free plant that tends to have lots of female blossoms and great late season pumpkin growth.

The 1350 Starr grew the 2nd biggest pumpkin last year and the 10th biggest pumpkin of all-time. The 1350 grows a nice smooth pumpkin and tends to have an amazing root system. It generally throws a lighter orange color.

Hoop Houses for Pumpkin Plants

I put out my hoop houses today to continue to warm the soil before transplanting. My hoop houses are green house like structures that the plants will stay in until late May to keep them warm and protected from the elements. Ideally I would put the plants into their hoop houses on Saturday but the weather is looking to be bad so I am going hold off until Monday evening. My hoop houses have 2x4 wood bases with a 7.75' x 6.5' dimension. I drilled holes into the 2x4s that are big enough to put 10' long pieces of 3/4 inch white irrigation pipe which is bent from hole to hole to create the hoops. I then put plastic (6 mil or thicker plastic is preferable) over the structure to create the green house for the plants. On warm, windless days I will take the hoop house off the plants. On warm days with some wind I will open up the hoop houses to try to keep the temperature between 80-85 degrees and at the same time keep the plants safe. At night I will have a 60 watt bulb in the hoop house to warm it with a brooder over the bulb so that the light doesn't point towards the plants. You want the plants to rest at night so as little light as possible the better.

Here we go....

On Your Mark...

Get set...

GROW...

The season is off and running. It is amazing how in just 36 hours these things grow. Unfortunatley the 1450 Wallace didn't germinate but we have some other great seeds that are doing very well.

Finally, Pumpkin Patch Prep is Complete

The soil finally got dry enough the I could do the final patch prep. Today I put down some nitrogen to make up for what was loss during the soil flush along with some PAM. PAM is my secret ingredient this year from Wallace Laboratories. To make a long story short, it turns out the manufacturer for PAM is just a mile from my house and I found it by accident. After talking to the owner of the plant and reading the scientific literature I believe PAM can give my soil the structure that it needs which will hopefully translate into big and better root structor. It is fun to watch pumpkin plant vines run and see big leaves, but at the end of the day big pumpkins come as a result of great root systems.

Next steps for the pumpkin patch will be putting down some large sheets of clear plastic to warm the soil and help keep it dry from the coming rain storms and putting the hoop houses into place. Hopefully we will be putting plants into the ground about two weeks from tomorrow.

The picture to the right shows the finished patch. The two stakes are where the plants will be planted.

Pumpkin Seed Planting

Giant pumpkin growers are always searching for great genetics to grow from. Winter time is filled with seed trades and research for which seeds to grow the next season. The most coveted seeds like the 1068 Wallace can go for $750 or more in auction per seed. When you have a good seed you want to make sure it germinates and grows into a nice pumpkin plant. Investing into a seed that doesn't germinate can be very disappointing and potentially costly. To try to mitigate the risk this is what I do when planting Atlantic Giant pumpkin seeds:

1. Write the number of the seed with a permanent ink so you don't get your seeds mixed up when planting



2. Lightly file the edge of your seed with some sand paper until you just start to see a light brown color coming through. Sanding the seed will help the plant get out of the shell and get it growing sooner. Atlantic Giant seeds can sometimes have tough shells so this helps get the seed off to a good start.



3. Soak the seed for 1 hour in warm water with a small drop of liquid seaweed in the water. The soaking will help start the germinating process faster and the cytokinin in the seaweed helps increase germination rates and may help early plant growth.



4. Many growers at this point will wrap the seed in a wet paper towel and then watch for the root to come out and then plant in their growing medium but I prefer to plant at this point right away so I don't have to worry about damaging the root. I am using 60% ProMix BX soil less medium for my seed starting mix combined with 40% earthworm castings from my worm bins. Studies have shown that new seedlings thrive in a 40-50% mixture of earthworm castings. This soil has been warmed to 80 degrees for the last 8 hours and then moistened with water so the soil is damp but not wet.



5. I then plant the seed into the medium that is in a 9 inch peat pot (wasn't easy to find these nice big pots but I got them at a local garden center) with the pointy part of the seed down 3/4 inch below the surface.



6. The peat pots are then placed in a small closet with a thermostatically controlled space heater at 80 degrees (about 84 degrees would be considered perfect but the thermostat on the heater only goes up to 80 degrees).
   

In 3-10 days I hope to start seeing the seedlings poking through the ground and at that point the season has officially begun.

Final Soil Report

I got my soil report the beginning of the week and things are looking much better. The sodium levels are back into the normal range but my phosphorous and potassium levels are still on the high side. I did another soil flush on Monday which will hopefully get my potassium numbers into a more normal range.

Once the soil has dried out I'll add some nitrogen to the soil to get those numbers back up (the nitrogen dropped with the soil flushes) and then we will be ready for roto tilling. After roto tilling I'll put my hoop house over the planting area to begin warming the soil. I'm hoping things start drying out soon. We expect rain here in Denver on Thursday and Friday so I'm going to hold off on planting my seeds for a couple more days to make sure I have time to get my final patch prep completed and the soil warmed before transplanting outdoors.

Pumpkin Season is Upon Us! Yea!!!

There is a little known disease that runs rampant around the world in January and February called Orange Fever. Symptoms include: irritability, angry outbursts on pumpkin discussion boards, and cabin fever. If you are not familiar with Orange Fever than you don't grow or live with a giant pumpkin grower.

Winter time is a hard time on pumpkin growers. There are the seed trades, soil seminars and genetic research but that isn't enough to keep the fever away. If anything all of that probably just adds to the fever. Slowly, like ice breaking on a frozen river, the fever breaks and is replaced with pumpkin obsession in Spring time.

Yes, pumpkin season is upon us. Finally! This blog, for those not familiar, is dedicated to the wonder of the giant pumpkin. In it you can find my entire growing season from last year and tips on how to grow big pumpkins. I'm not an expert, yet. But the 755 pounder I grew last year was a great rookie start and if I can get my new soil up to par I hope to get over 1,000 pounds this year.

If you would like to grow a giant pumpkin I can give you some great seeds. Planting time for most growers will be in the next three weeks. With transplanting outdoors, into hoop houses, the first couples of weeks in May.

To answer the most common questions about growing giant pumpkins:

1. What do you feed it? Mostly a good composted soil and organic fertilizers. I water 4 times per week for a total of about 1.5 inches or more depending on weather. You want the soil to be lightly moist but not wet between watering.


2. How do you move it? This is one was a big concern for me but it really wasn't a big deal. You simply throw a little pumpkin party at the end of the season and have 5-8 friends help you lift it with a lifting tarp. It was really fairly easy.


3. What do you do with it when you are done with it? This is really up to you. Most pumpkin growers compost it.

It takes some time and patients to be a giant pumpkin grower, but if you would like to grow a big pumpkin for Halloween it really doesn't take much effort. To get a pumpkin over 100 pounds is really fairly simple with a good Atlantic Giant pumpkin seed. Give it a try this year. You may love it! There is a great pumpkin grower group in Colorado willing to help you or leave a comment below with any questions you may have.

High Sodium Soil in the Patch

I haven't even planted a pumpkin seed yet and I've already had my first two screw ups of the season. Both came in the form of the same compost manure. The first mistake is not to take a hard look at the amount of phosphorous being added when adding poultry compost to the soil. It actually is a common mistake to look at just the nitrogen levels (which I did) and ignore the phosphorous numbers going into the patch. High phosphorous shouldn't cause the pumpkin plant to much trouble but it probably will cause the myco to be less effective.

The second mistake is that high sodium levels were introduced into the patch with the poultry compost. My fall soil test showed very low sodium levels but the most recent soil test numbers showed the sodium levels through the roof. There is only one source that this much sodium could have come from and that is the poultry compost. I've learned recently that some chickens are given a high phosphorous and salt diet to keep malnutrition away and to plump up the chickens. Apparently that was the case for where my compost came from. I was told the compost was Class I compost but apparently that wasn't the case. The lesson learned is to know the source before it goes into the patch. Joe Jutras had problems with his poultry compost last year too and he still grew a 1507 pound pumpkin. Hopefully I can do some things to fix at least the sodium problem.

To get the sodium out of the soil I am adding 20lbs of gypsum and flooding the patch with water. Base on some tables from the Colorado Extension service I need about 6 hours of irrigation to flush out the sodium by about 50% in my clay soil. I started that process on one half of my patch yesterday. After everything has dried out I'm going to get another soil test done and see how much nitrogen, potassium and magnesium I need to put back into the patch because those amendments should be somewhat flushed out by the irrigation too.

Pumpkin Seed Selection

This is the Sophia's Choice time of year. The time of year when you have to make the tough choice for what pumpkin seeds to plant. A lot of great growers have been very kind to share some great seeds with me. After doing some pumpkin seed genetic research I have decided to go with the 1566 Rodonis (1450 Wallace x 1231 Pukos), 1450 Wallace (1068 Wallace x Sibb), 1350 Starr (985 Werner x 227 Leland) and the 1363 Werner (985 Werner x 1450 Wallace). There are about 5-6 other seeds, in particular the Van Kooten, Doucet, Grande, Mohr, Hooker, Zaychkowsky and Hunt seeds that I would love to plant but I only have 2 1/2 spaces so choices have to be made. The 1/2 space will be a pollinator which will be my 4-year-old daughter and 2-year-old son's plant. Some of the other seeds that didn't make the cut will see dirt next year, given back to the grower or will be traded.

I like the seeds that I will be planting because they have four main genetic lines that I believe are some of the best. I like the 1068 Wallace genetic lines because no seed has ever performed better with a world record and the second biggest pumpkin grown to date coming from it. The 1231 Pukos is the reverse cross of the 998 Pukos and you have to like those world record genetics. The 985 Werner I think is one of the top seven new super seeds (in my opinion the 1385 Jutras, 1566 Rodonis, 1161 Rodonis, 1350 Starr, 1041 McKie and 1689 Jutras all fit in that class) and may surpass 1068 with time. The 227 Leland has the great old school genetics with the 723 Bobier x 1370 Rose. The 723 Bobier probably was just as good a seed as the 1068 Wallace but was a head of its time in terms of grower technique.

I'm really look forward to this season. If I can get my sodium and phosphorous levels down in my patch some I think I'm in a position this year to get over the 1,000 pound mark. Only time will tell however. Lots can happen in a season.

Seed Starting Mix Round 3

Last year I did some experiments with seed starting mix and found that not all starting mediums are equal. This year I tried round 3 of the testing with thee different mediums. I had read how a lot of people liked Fox Farm's Light Warrior soiless medium. I am a big fan of Fox Farm's products so I decided to give it a try. I did three plantings for this test. One with Ligth Warrior, one with Light Warrior plus 20% earthworm castings added in and one with Jiffy Mix soiless mix. After 4 days the Light Warrior with earthworm castings plant came up. After 6 days the Light Warrior plant came up and after 7 days the Jiffy Mix plant came up. In the picture to the right the plant with the earthworm castings is the biggest one, the 2nd biggest is the Light Warrior plant and the smallest plant is the Jiffy Mix plant.

Irrigation in the Pumpkin Patch

I "completed" (except for one broken connection) my patch irrigation system yesterday. It is pretty simple but it will work. I have two sprayers that pretty well cover the patch on each end of the patch. The sprayer is attached to a hose end battery operated timer that will be set to run Monday, Wednesday, Friday morning for 24 minutes. And then every day at 11:00, 1:00 and 3:00 I'll have the timer set to run for 1 minute to cool down the patch in the hot part of summer.

Pumpkin Grow Light Setup

After doing a little research I decided that I could do a very inexpensive grow light setup for my pumpkin seed starting that should work as good as the $80 setups that I've seen in the store and online. The setup consists of two 100 watt, 6500K CFL light bulbs from Wal Mart ($4); two brooders ($10); and the timer plug that we use for Christmas lights (already had it so $0). I screwed in the bulbs into the brooders so I could direct the light to the plants and plug the brooders into my christmas light timer so that the lights would run for 14 hours during the day without me having to remember to turn it on or off. The whole setup was placed on a table in a closet so I could better control the temperature. In the closet I place a thermostatically controlled electric heater that I got at Big Lots ($15) that was run at nights when the lights were off to keep the plants at around 80 degrees. At the base of the planting cups I put a wireless thermometer so I could watch the temerature which stayed at a very consistent 75 degrees. Closer to the bulbs where the plants leaves were located it was about 81 degrees. My test planting proved to be very effective with all of the pumpkin plants coming up and growing nicley.

Back in the Patch Again

Someone didn't tell mother nature that it is still winter, but I have been enjoying getting out into the patch again in 70 degree weather. Over the last two days I have been roto tillig and pouring compost tea over the patch. My initial tilling in the fall didn't get me nearly as deep as I wanted to go because the ground was so compacted so I have been letting the tiller run as deep as I can. The soil is looking much better than it did in the fall. Better tilth and lots of nice organic pieces in the soil. I don't expect my soil to be perfect this year (it takes a while for everything to break down and for the biology to build in the soil) but I think I will be good enough. I have a little more tilling to do and then I am going to wait until my soil analysis gets back to see if I need to add anything else. After the last analysis I will till the soil again going in a perpendicular direction to what I went last time in final preparation for planting.

Welcome to March, Warm Weather & Pumpkin Patch Prep Time!

It is looking to be 70 degrees today after a string of warm weather last week and forecasts in the 60s the rest of this week. It is taking all of my will power to not put a seed in the ground. Lots of snow days to come but you wouldn't know it from the weather we are having. I saw two bees flying around yesterday and one of my aspen trees is looking like it is getting ready to bud.

Today I went out in the patch and turned the soil with a spade fork. I sent off a soil sample to the lab last week so I'm hoping to get a report back this week so I can do some final prep while the weather is still so good.

My soil still needs a fair amount of work but it is looking much better than it did in the fall. Depending on what the test results say I'm planning on adding about three more yards of compost to the patch and building some mounded areas where I will be planting. If anyone knows of a good bait shop around Arvada I would like to buy some nightcrawlers to add to the soil. I'm still not seeing any worms in the soil which is a little scary.

Two Months Until Planting Time

Just two more months until pumpkin planting time. That means that final patch prep and soil analysis will be some of the main tasks over the next 6 weeks. I got two yards of some really good compost today that will be rototilled in around the end of March or the beginning of April. I'll be getting a soil test in the next couple of weeks to find out exactly what I need to put into the soil to get it ready for planting around the first week of May. Rigth now I'm not very happy with the soil tilth and the depth of the soil until I hit hard pack so that will be some of my main focuses. I'll also be building some hoop houses around the end of March which I'll put out around the middle of April to start warming the soil.