After sowing, the clock starts. Most establishment failures occur in the first 8 weeks — either from poor germination, moisture stress between rain events, or slug/insect damage. Regular monitoring lets you intervene early if things are going wrong.
What to look for in the first 30 days
- Signs of germination — small two-leaf seedlings emerging within 10–14 days of a 25 mm+ rain event
- Even distribution — patchy emergence may indicate uneven sowing depth or seedbed moisture
- Seedling density — target at least 5–10 seedlings/m² for most tropical grasses at this stage
- Weed pressure — fast-growing annual weeds can overtop slow-establishing grasses; assess severity
Days 30–90: consolidation
By 6–8 weeks, surviving seedlings should be tillering and beginning to develop root systems that access subsoil moisture. Leaf area is expanding rapidly. This is the most vulnerable period for moisture stress — a dry spell of 2–3 weeks at this stage can kill seedlings that appear healthy.
Do not graze at this stage, regardless of the apparent feed on offer. Grazing before seedlings are fully rooted (typically after first flowering) will pull them from the ground and set back or destroy the stand.
When to accept a failure and re-sow
If seedling density is below 2–3/m² after the first good growing rain, or if large patches (more than 20% of the paddock) have failed, you may need to consider an inter-sowing or partial resow. Discuss with your agronomist before giving up — sometimes a slow start with dense seedlings is better than a patchy dense stand after resow.
Record keeping
Note the date of sowing, sowing rate, rainfall received, and seedling counts in your paddock records. These become invaluable when comparing future pasture performance between paddocks.