Categoria: Growing Degree Days

Environment

Save Water, Build Roots, Smooth Surfaces with Primo Maxx II

Digital Tools

“To GP or not to GP, that is the question”

Growing Degree Days

Kicking off Primo Maxx II, 2025

Plant Growth Regulators - the rebound curve

Growing Degree Days

Primo Maxx II: What, when, how?!

Growing Degree Days

Kicking off Primo Maxx II, 2024

Primo Maxx II Keep Using It

Autumn

GDD 101 – And reasons to keep the program ticking over even though Summer’s done

Growing Degree Days

Primo Maxx II – Can I trust the model when its this hot?!

If you are in the UK you will know its been very hot recently, and Ireland has seen its share of the heat wave also; Dublin’s Phoenix Park recorded 33.1C (91.4F). The hottest day in 135 years across the island of Ireland. I saw on the news that the UK had its hottest night on…

Growing Degree Days

The calculator is wrong!

A quick one… When looking at the GDD calculator on the Syngenta turf website. Sometimes people look at the high temperature and the low temperature and ask the obvious question. 12.1 + 6.7 / 2 = 9.4 not 8.8. Well yes and no If you’re working Growth Degree Days out for yourself that’s exactly how…

Growing Degree Days

Growing Degree Days – 0c or 6c?

If you’ve been studying the Greencast GDD calculator you’ll see this is the time of year when there is huge differences between 0c and 6c base temperatures. Of course the immediate reaction is that something is wrong. But it’s important to note:- by using different base temperatures we are measuring very different things and those…

Growing Degree Days

Primo Maxx II – when to start?

At this time of year I regularly get asked when should I start my Primo Maxx programme. I’ve added some additional complexities to it this year, because I’ve been talking a lot about growth degree days. Primo Maxx has been used for a long time now and I’ve seen a lot of different timings and…