Soil PrepHow to have the best soil
Great Soil = Great Results
How Important is Soil to Giant Pumpkins
Learn about Soil
The Different Levels of Soil Prep
pH Level Explained and How To Amend It
High pH levels
- There are usually two products that can be used to lower the pH level of your soil, Aluminum Sulphate and Sulphur.
- Both of these products can be obtained from most garden centres.
- Aluminium Sulphate is a faster acting product with results noticeable instantly as the aluminium produces acidity in the soil as it dissolves.
- Sulphur, on the other hand, is a much slower method to reduce the pH level and can take some months to achieve the desired result.
- Both options should be worked into the soil after application for best results and make sure to follow recommended application rates on the packaging as these can be easily over applied.
Low pH levels
- Low pH can be a common problem in a lot of areas and the most common way of bringing the pH level up is to apply lime.
- Lime can come in chip form or finer. The finer the product the faster it will work.
- Paying attention to the application rate is important. To be most effective lime needs the contact with the soil, this provides the moisture lime needs to work properly. Dry soil will make the lime have very little effect on the pH level.
- A cheaper alternative to using lime is wood ash, this method will take longer and should be applied well before the season start.
Soil Testing – How it is Done
Soil Sample are Taken
Soil is Given to the Lab
- A Basic Soil Profile
- Available Nitrogen
- Trace Nutrients
Interpret the Results
My Soil Testing Journey
One year I was growing in a large enough area to get a soil test done, I documented it over 3 blog posts.
What makes up organic matter?
This term of organic matter covers a wide variety of living or dead and animal material, which ranges from kitchen waste, shredded leaves to well rotted compost and manure.
The benefits of having organic matter in your patch is:
- Help supply nutrients for plants by providing surfaces where nutrients can be held in reserve in the soil.
- Help with better drainage by loosening the soil structure.
- Can help store water within the soil
- Helps increase the air flow in the soil
- Increases the activity and numbers of soil microorganisms
- Encourages earthworms
Having around 10% organic matter in your patch is a good starting point, your soil test will be able to tell you how much you have started with.
Animal manure can and is used, but caution has to be given as too much can upset the balance of microorganisms within your patch.
Cow and horse manure are the two best options for manure in your patch, but only if it is well rotted and aged. There is no point in adding manure if you can’t do it early enough so it breaks down.
Keep in mind that animal manure that is not heat treated will contain grass and seeds which can lead to more weeds than expected during the season.
Getting your pumpkin patches soil into the best possible condition will pay off big time later on.
It might seem overwhelming to first time growers, but doing what you can to improve the soil is something everybody should be doing no matter their skill level or budget.
Cover crops bring a lot of advantages to your pumpkin patch, especially if timed well during the season. Benefits of a cover crop are:
- It can be a great green manure that can be dug back into the soil
- Great as a nitrogen fixing plant, storing nitrogen from the air into nodules on the roots
- A natural way to provide weed protection
- Can help stop the effects of soil erosion caused by wind, rain and the sun.
- Water retention can be improved in soils with hard soil pans
- Can control soil borne fungi and nematode problems within the soil
For all the different types of cover crops you can use, growth times and sowing rates head over and read this in depth post.
The No Dig Principle
In a lot of organic gardening literature the no dig way of gardening is outed as being one of the best things you can do.
While this might sound a bit crazy the idea behind it is once organic material has been added and possibly dug in, leaving the soil as untouched as possible allows for all the microorganisms to do their work.
Any digging or tilling as it is sometimes called can ruin the relationship of the soil structure, and could do more harm than good. It is an interesting concept which can be part of your giant pumpkin patch.
Having your soil temp correct at time of transplanting your plant out into the patch is important, it helps prevent as much shock as possible for the plant, and also allows all the soil organisms to work in harmony to create an ideal soil structure for your seedling. A temperature of around 18 degrees Celsius is ideal.
To achieve this ideal soil temperature can be tricky. Factoring in when the last frosts of the season should be part of your planning for your patch. Really cold areas of the world use soil heating cables and heating lamps within a temporary structure. While the heating cables and lamps probably won’t be needed for most parts of NZ, a temporary structure is a must.
There is always more to learn with soil
As you can see there is a lot of information out there around soil, and this is just a very small selection to help get you thinking. If there is one area in giant pumpkin growing that helps people gain an edge and break records it has to be soil.
Getting the soil right will help you grow bigger pumpkins.