As August rolls around, we often start thinking “spring is here.” Warmer days, longer daylight and a bit more sun can certainly lift the mood. The temptation is to believe our pastures are waking up too. But for those managing kikuyu, paspalum and other pasture species, it’s important to understand what’s really happening beneath the surface.
False spring for kikuyu Kikuyu, a warm-season perennial, might look like it's starting to green up in late August, but don't be fooled - this is a false spring. The plant is responding to sunlight and day length, but real growth won’t begin until soil temperatures consistently reach 12°C or higher, typically not until mid to late September in most of Greater Sydney.
Applying fertiliser too early based on visual signs can be wasteful, as the plant’s roots are still relatively inactive. If you’re looking to feed kikuyu and make the most of nitrogen, wait until those soil temps climb. Consider using a soil thermometer and placing first thing in the soil at 9am to guide your decisions.
**When does spring really start for temperate species? ** If you’re growing temperate grasses like ryegrass, phalaris, or cocksfoot, spring growth will start earlier than kikuyu but still not as early as the calendar might suggest. These species generally respond to soil temperatures from 8–10°C, so you might see genuine spring growth from late August into early September, depending on your paddock’s aspect and soil type.
That said, each year varies. North-facing slopes, shallow soils, and areas with good drainage may warm up quicker. Use visual cues alongside soil temperature checks to time grazing rotations or fertiliser applications effectively.
Key takeaways for small farms: Don’t trust green tips alone: kikuyu’s true growth kicks in when soils are reliably warm (12°C+). Temperates are earlier but still soil-temp driven: watch for consistent 8–10°C soil temps. Avoid early inputs: premature fertiliser or grazing can stress pasture and waste resources. Consider your microclimate: paddock orientation and soil type make a big difference. A little patience now can mean better pasture performance and better returns in the season ahead.
