Seeds germinate in spring, with seedlings slow growing until established. Seeds germinate readily in moist conditions and grow rapidly once established. After draining and then rinsing seeds at regular intervals, the seeds then germinate, or sprout. The germination rate is the length of time it takes for the seeds to germinate. Acacia seeds can be difficult to germinate. Seeds planted deeper than are not likely to germinate. However, the seeds also can germinate under moist soil. Strigolactone stimulates ethylene biosynthesis in seeds causing them to germinate. The seeds germinate immediately without a dormant period. Squash is a frost-tender plant meaning that the seeds do not germinate in cold soil. Spores will not germinate in larvae over three days old. Some seeds may not germinate until the second spring. Seeds germinate slowly and may take several years. Fresh seeds will germinate in about seven days. Spores will not germinate in larvae over 3 days old.