Growing Guava tree from Seed Growing guava from seed may not produce a fruiting tree for up to eight years, and the plants are not true to the parent. Therefore, layering and cuttings are more often used as propagation methods for guava fruit trees. Growing guava seeds, however, is a fun project and produces an interesting hybrid guava plant. You need to harvest seed from a fresh fruit and soak off the flesh. The seeds can remain usable for months, but germination can take up to 8 weeks. Boil the seeds for 5 minutes before planting to soften the tough outside and encourage germination.
The exotically sweet guava fruits sold in larger grocery stores and guava fruit vendors comes from a tropical evergreen shrub or small guava tree that can be grown as an unusual potted plant. And in many regions, that's the only way to grow it, as this plant is very sensitive to cold and will succumb to the smallest hint of frost, especially when the plants are young
Guava tree Planting through Seed
Guava is a shrub or small guava tree with a single or multi-stemmed trunk. Guava tree has mottled green bark and long, 3- to 7-inch serrated leaves that sit atop a wide, short canopy. The white flowers produce oval or pear-shaped fruits between 2 to 5 inches in size. The taste and color of the guava fruit differ based on the variety.
In the landscape, these hybrid guava plants can grow to 20 feet or more in height, but as an indoor container plant, it is kept much smaller. Getting indoor guava plants to flower and produce fruit is a hit-or-miss proposition, at best, so the guava plants are generally grown as novelty specimens, much the way an indoor orange or fig tree is grown.
As is done with other tropical guava fruits, it can be great fun to collect guava seeds from a grocery store fruit and grow a little tropical guava tree. But be aware Guava trees grow very, very slowly when young before hitting a growth spurt. It can take 4 to 8 years before a plant sprouted from seed will reach fruiting maturity if it sets fruit at all.