Tag Archives: recycling milk cartons

My six upcycled air-pruning plant pots now complete with their newly sown Sweet Pea seeds

Sowing and growing in upcycled air-pruning plant pots

My air-pruning plant pot project is continuing to make good progress. In my last post I’d added some upcycled fabric grow-bags to the upcycled plant pots I’d created from milk cartons. The next stage was to fill my now-fully-prepared air-pruning plant pots with compost and sow my Sweet Pea seeds.

I discovered the cut-off piece of the milk carton made a very useful sized scoop when filling my air-pruning plant pot with compost
I discovered the cut-off piece of the milk carton made a very useful sized scoop when filling my air-pruning plant pot with compost
In the process of making my milk carton plant pots I’d cut off a scoop shape from the top of each carton. I discovered one of these mini plastic scoops made an ideal assistant for filling the plant pots with compost. I filled the pots quite close to the top with compost but left enough space to accommodate sufficient watering.

I generally plant seeds into ready-watered compost, so the next job was to carefully water the compost in the fabric grow-bag. As I was adding the water, I was also watching to see how the water soaked through the compost and out into the fabric grow-bag. When I’d prepared the air-pruning plant pots I hadn’t made drainage holes in the base of the pots as I felt there was plenty of opportunity for evaporation through the sides of these smaller-sized air-pruning pots. I’d left about 2.5cm /1 inch intact around the bottom of the plant pots too, to catch the water if I did happen to water them too enthusiastically!

I left the bases of the milk cartons intact so that they would catch any extra water whenever I watered the Sweet Pea seedlings
I left the bases of the milk cartons intact so that they would catch any extra water whenever I watered the Sweet Pea seedlings

Now it was time to sow the Sweet Pea seeds. Sweet Pea seeds are quite large, as seeds go, so for this task I used my ‘old pen’ dibber to make the holes in the compost about 1.5cm / half inch deep. I decided to sow two Sweet Peas in each pot. Then after sowing the seeds I used the dibber to cover them over with compost before adding a final drop of water to help the seeds on their way.

Making the planting holes with my 'old pen' dibber for my Sweet Pea seeds
Making the planting holes with my ‘old pen’ dibber for my Sweet Pea seeds

And that was the seed-sowing done. The only remaining task I had was finding a suitable indoor home for my plant pots … time to build a new shelf …

All of my Sweet Pea seedlings are doing well in their air-pruning plant pots
All of my Sweet Pea seedlings are doing well in their air-pruning plant pots

I’m pleased to say that all of the Sweet Peas have now germinated and the seedlings are looking healthy.

Now I must get working on completing my crochet jute and willow garden screens ready to support the Sweet Pea plants in my back yard … hopefully I’ll be posting more on that very soon.

J Peggy Taylor

Making air-pruning plant pots from milk cartons - I decided to cut different-shaped vents in some of the pots

Upcycled plant pots with air-pruning in mind – Part 1

I was so inspired by the air-pruning video I shared with you a few days ago that I immediately decided to try out this seemingly magic method of improving plant growth. I already had imminent plans for sowing some Sweet Pea seeds as I am planning on training several Sweet Pea plants to grow up and through the crochet jute and willow garden screen that I have also been working on recently. The willow garden screen project is my experimental version of location-specific vertical gardening.

Two rows of jute crochet bind the willow rods in place
Two rows of jute crochet bind the willow rods in place

As my back yard is only very small I needed to develop some air-pruning pots that would be more size-appropriate than the 5 gallon buckets they used in the video. But I also wanted some containers that would reasonably accommodate the Sweet Pea plants. I have grown Sweet Peas in my yard in the past using moderately-sized containers and with a bit of care they successfully reached their full six-foot height.

A further consideration was that I need to be able to attach some of the plant pots to the back of my yard gate, so lightweight containers with ‘attach-ability’ were additional factors to bear in mind. And, as I frequently do, my preference was to use upcycled materials for this project too.

The solution to my air-pruning plant container conundrum is … four-pint milk cartons! These milk cartons satisfy all of my requirements – lightweight, with built-in handles for ‘attach-ability’, moderately-sized and easily re-designed for their new purpose … and upcycled.

Fortunately, I had a number of these milk cartons readily available as I had saved them ‘just-in-case-I-need-some’ – I’ve made milk cartons into standard-type plant pots on previous occasions. But this time my design plan was rather different.

Making air-pruning plant pots from milk cartons - cut carefully around the milk carton's original opening, making sure you leave the handle intact
Making air-pruning plant pots from milk cartons – cut carefully around the milk carton’s original opening, making sure you leave the handle intact

I began by making a large planting hole at the top of each carton by cutting around the original milk carton’s opening. You can see I have cut high above the carton handle to leave the whole handle intact. Around the sides and front of the carton I dipped down a little lower with the scissors to make a reasonably-sized opening to give accessibility.

Next I pondered on the best way to ventilate the sides of the cartons to provide the air-pruning effect. The air-pruning video showed circles cut out of the sides of the 5 gallon drums. I emulated this on the first carton, cutting out relatively large holes all around it.

Making air-pruning plant pots from milk cartons - I decided to cut different-shaped vents in some of the pots
Making air-pruning plant pots from milk cartons – I decided to cut different-shaped vents in some of the pots

However, I then wondered if different shaped holes would be more or less effective at air-pruning. To test out my curiosity, I have decided to make different shaped holes in some of the cartons. Two cartons have circles, two have wide vertically-oriented ovals and the remaining two have a series of narrower vertical vents. It will be interesting to see if the different-shaped vents in the containers make any difference to the plant growth.

Watch out soon for Part 2 of my upcycled air-pruning plant pots project in which I will show you how I made the fabric grow-bags to fit inside the pots.

J Peggy Taylor