Warding off Jack Frost- Cromwell

Catch-up (early October, 2019)

After I'd completed my mega road trip from Winton to Cromwell & Lawrence return, to photograph the fruit blossoms, a photography acquaintance mentioned that I should do the trip again, at least to Cromwell, to take photos of the blossoms after the frost protection sprinklers were switched on in the orchards. 

Sunrise over Cromwell

How do frost protection sprinklers work? Coating a tree or vine with ice to protect new buds & blossom from frost may seem counter-intuitive but there is a science behind it.

Overhead low pressure sprinkler systems provide a high level of protection, the key is to form clear ice on the plant. Sprinklers deliver just enough water to glaze the plants in layers of ice, rather than soaking them and forming one massive layer of ice that may cause more cooling before it freezes.

Clear ice means that an endothermic reaction is taking place and the warmth of the plant is being trapped inside it. If the ice starts to become cloudy, the plant is losing heat and that’s when damage can occur. Water spraying starts well before the frost forms and continues until after the ice has completely melted from the trees. If water stops spraying on the clear ice, it goes from being endothermic to exothermic, and the heat loss and ice can then damage the fruit.

Drive back to Cromwell? 'What a good idea', I thought, the seed was planted. It would mean a 4am start to cover the 200+km from Winton to Cromwell but I was up for the challenge. Like a hoar frost, iced blossoms had been on my 'must capture' list for awhile, I'd just never been in the right place at the right time. Now was my chance. 

My friend had access to a Cromwell orchard's temperature gauge and he informed me by text late one evening that there was a predicted frost the following morning and I should be ready to go.

It turned out to be a very light frost and the sprinklers weren't needed but thankfully he was able to text me before I had left Winton. The next time I heard from him was a week or so later but unfortunately we had left Winton and were exploring the Milford Road by then, so I missed out again.

But as luck would have it, and after our short visit to Mavora Lakes, we were unexpectedly back in Cromwell parked in the NZMCA Park at Lowburn when very early one morning, around 3am, I woke with start to a very loud noise filling the air.

Once I figured out where I was- you get that when you're constantly on the move, it's sometimes takes a few moments to visualise where you're parked and in what direction you're facing- I realised that I could hear wind turbines and helicopters roaring into action, preparing to fight off a frost. 

How about that! I had no need to drive 400km this time, I was a mere 4kms down the road from the orchards! I was ready to go and out the gate well before the sun came up. The first orchards were still in darkness but I could hear the soft click, clack of the sprinkler heads turning and the gentle patter of water falling through the trees to the ground.

I carried on to the far end of Cromwell and then around onto a back road; sprinklers swishing back & forward everywhere I looked, a helicopter down very low in one orchard, weaving back and forward along the ends of the rows and the roar of wind fans and turbines in others.

All three methods obviously work but I'm not too sure how the orchardists decide which is the best way to go; sprinkler systems seemed to be most numerous.

Perhaps it's money, helicopters would cost a fortune, maybe there isn't access to water or perhaps the wind turbines can be shifted around the orchard more easily.

I had overlooked one major difficulty which now seems rather obvious. I was soaking wet within minutes of getting out of the ute- even with a rain jacket & gumboots on.

It didn't matter that I was ducking in and out of the passing overhead sprinkler trying to shoot a blossom before the sprinkler passed over again because if the sprinkler next door didn't get me the neighbour on the other side would. They were all out of sequence. 

Luckily I had an extra jacket in the ute and there were a couple of large towels packed into the back seat. I used one to cover the seat as I was climbing in and out in my wet gear all the time and the other one to wipe down my camera and dry my hair! I looked like a drowned rat. 

I was a little worried about my camera though, it's weather proof but not water proof and also, as I was zooming my lens in and out, water was tracking inside the lens.

Later when I arrived home and had dried my camera and lens out as much as I could, I left them on the bed in the warm sun to dry them out. I opened the window a little so any water would evaporate rather than condensate in the warmth. It worked although it did take a few hours each day to get rid of the moisture. Next time I need a waterproof cover for my camera.

After flitting back and forward through town and up and down down many of the back roads chasing sprinklers and easy to access orchards, I stopped at the Wooing Tree Vineyard, right in the middle of town. The sprinklers were also working overtime here and...

...at River Rock Estate, a little boutique winery across the road...

...where I managed to do a few close up shots...

...without getting drenched as I could keep outside the sprinkler's reach. 

Then with the sun climbing higher, the ice melting and enough blossoms photos to sink a ship, I thought I might just add a few more before I headed home. 

I'd passed this row of beautiful old crab-apple trees numerous times during the last couple of hours, now I stopped to take some photos of the gorgeous blossom.

Never satisfied and always striving for better photos, I can't wait until the next frost event. If you're passing through Cromwell next spring and you spot someone with a camera, ducking & diving around the fruit trees on the edge of an orchard covered from head to toe in ocean going wet weather gear, you'll know who it is! 

Moody Mavora & Snowy Garston

Catch-up (early October 2019)

From the DOC camp at Cascade Creek on the Milford Road we returned to the NZMCA Park at Te Anau for a few days. After a week out of range, it was good to have cell phone & internet reception again before we headed to our next destination Mavora Lakes- one of our favourite South Island destinations- which is also out of range. 

The road to the lakes leaves the main highway about halfway between Te Anau & Mossburn and from there, there's 'just' 34kms of gravel to travel until you reach the lakes turnoff which is then followed by another 8kms of gravel to the lakes; past South Mavora and onto North Mavora Lake.

For the first 15kms or so we travel in an unseen grader's freshly scraped track. We not-so-quietly curse as clouds of dry dust billow out behind us. Sometimes you just can't win; another couple of days and the dust would have settled and the road would have been silky smooth. I guess dust is better than being rattled to death by the corrugations although we have them to contend with for the last half of the journey.

Never mind, our favourite camping spot is free which isn't really a surprise, only the hardy (or crazy) camp at the lakes at the tail end of winter when the weather swings between bitterly cold & freezing cold.   

North Mavora Lake & Mt Cerberus

That would be hardy people, crazy people or hardy crazy hunter people. There's a hunter's camp up the back of the plateau, tucked into and sheltered by the thick bush. There are a couple of pig dogs in a kennel beside a horse float and down in the horse paddock I can see two horses. 

As soon as they spot me, they gallop over to the fence for a chat & a pat and then follow me along the fence line hoping I have something tasty for them. I don't, there's just dry grass and more dry grass.   

I'm keen to cross the swingbridge and check out the bush for Robins/Toutouwai & Rifleman/Titiponamu...

...but all I manage to find is one lonely robin who watches me expectantly, hoping I'm going to scrape some leaf litter for him. Of course I oblige.

It really was bitterly cold. As night closes in, snow starts to fall and David is not impressed. He's turning into a fair weather fisherman. The snow doesn't amount to much and is gone by dawn. Thank God for our diesel heaters, we're kept toasty warm inside.

The next day I walk up to the plateau behind and disappear into the bush...

...there are a few more Robins up here but still no sign of any riflemen. In fact the bush is very quiet, perhaps it's just too cold for them and they've moved deeper into the bush seeking shelter.

I break apart a rotten log and several birds are very keen to see what I've unearthed. Although not so keen to share as they chase each other about trying to keep the spoils for themselves.

Several more 'crazy' people have arrived overnight, one parked up in the wide expanse of tussock on the lake shore below Mt Cerberus...

...and the other sheltering in the trees near the fire pits. 

David has been reluctant to get the inflatable boat out, it has been very cold & windy, and the forecast is for more wind and heavy snow. We'd also had some unsettling news from family on the way in that had us distracted and with no cellphone reception, we'd started to worry that we really should be in range. 

So when we woke the next morning, and with the weather no better, we made the decision to head on out.  

We'll leave Mavora Lakes for the summer this time. 

South Mavora Lake & the road out

We decided to head to the NZMCA Lowburn Park at Cromwell, somewhere where we could settle for a few days and re-plan our next few weeks. We needed to stay around the lower half of the South Island in case our Southland family needed us to head back to Winton to look after the house & cat if they were suddenly called away.

On the way to Cromwell we stopped for a night at one of our favourite (and 'secret') freedom camping sites near Garston.

Brightwater & Castle Hill, Garston

Although we missed the 'Closed due to Lambing' sign on the way in, seeing it on the passenger side of the road the next morning on our way out. Oops! We'd both been reading the trout fishery sign on the driver's side instead.  We also didn't see any sheep until the next morning, they must have been hiding under the willows at the far end of the paddock.

But we did see the neighbours walking their goats. The goats were having a great time too, snatching mouthfuls of grass, running to catch up, kicking up their feet and racing ahead of the others. 

It was once again bitterly cold overnight, our diesel heaters working overtime until we went to bed. We very rarely need to leave them on overnight due to the van's insulation and our winter bedding.

Sometime during the early hours of the morning I heard the familiar gentle splatter of snow on the roof. I silently hoped we'd be snowed in for a few days but on opening the door the next morning there was just a thin layer covering the ground. 

Never mind, it was still a wonderful sight and a winter wonderland 'Out There'. I love waking to snow, being 'johnny-on-the-spot' and able to step outside in my dressing gown & gumboots to take photos, all within 5 minutes of getting out of bed.

The Mataura River had turned a dirty brown, rain has obviously fallen in the back country.

Here's the stock bridge the afternoon before the snow fall (this bridge is my favourite piece of farm equipment in all of New Zealand) 

Thick cloud gave way to blue sky...

... and the snow started to disappear before my eyes.

And by the time we were ready to pull out the snow had gone and dark clouds had rolled back in.