How long does it take Mexican petunias to spread?

Mexican petunia, also called desert petunia, establishes itself quickly when you start with a nursery-grown seedling or young plant. It generally produces groups of strong, semi-woody stalks about 3 feet tall that bear attractive foliage and produce flowers within a month or two.

Do Mexican petunias grow fast?

The Mexican petunia (Ruellia brittoniana) is a fast grower, quickly spreading through self-seeding and rhizomes. Because of their fast growth, these plants are considered invasive.

How long does it take for Mexican petunias to grow?

Quick Reference Growing Guide

Time to Maturity 1-2 months Soil Drainage:
Spacing 12 inches Companion Planting:
Planting Depth: 1/4 inch Uses:
Height: 8-12 inches (dwarf type) 18-36 inches (tall type) Family:
Spread: 24-36 inches Subfamily:

Are Mexican petunias invasive?

The wild, invasive form of this plant is so aggressive, it’s banned in some states, and it’s on a watch list of invasive plants in others. The state of Florida lists Mexican petunias as “highly invasive.” Native to Mexico and western South America, Ruellia simplex, also known as R. tweediana, R.

How tall does Mexican petunia grow?

Mexican-petunia is a perennial in zones 8 to 11 that stands up to 3 feet in height. Stems are green or purple and leaves are dark green, oppositely arranged and lance-shaped, roughly 6 to 12 inches long and ½ to ¾ inches wide.

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Should you cut back Mexican petunias?

In general, the only pruning a Mexican petunia requires is an annual pruning in late winter or early spring to remove damaged, weak or otherwise undesirable stems back to the base of the plant. Cutting back spent flower stalks during the blooming period helps maintain a neat appearance.

How long do Mexican petunias bloom?

Each of the petunia-like flowers lasts about one day but the flowering season is considerably long, lasting from early summer and fall.

Do Mexican petunias come back?

Answer: Mexican petunia is considered an herbaceous perennial, which means it freezes to the ground if it gets too cold and grows back from the base. It is summer flowering so the flowers develop on new growth.

Why are my petunias not spreading?

Keep them watered — but don’t overwater them

On the other end of the spectrum, if your wave petunias are getting a lot of sun and not enough water you may see the plants not bloom as much. Water and sun are some of the basic needs of a plant, so make sure that the plant is properly watered.

Do petunias spread out?

Groundcover or “spreading” petunias are only about six inches tall, but spread so rapidly that they cover a huge area over one growing season, provided they’re watered and fertilized frequently.

Do all petunias spread?

Do All Petunias Spread? … Not all types of petunias spread like wave petunias. Grandiflora petunias, for example, have large blooms, up to five inches across. They do well in contained areas such as window boxes or hanging baskets and do not require a large space in which to grow or spread.

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Why is my Mexican petunia not blooming?

The plant may bloom when it is lightly shaded for part of the day, but as a rule, a petunia not blooming can be because it does not get at least six hours of direct sun per day. … If you’ve planted petunias in a shady spot that can’t be remedied, you may need to replant the petunia plant with no flowers.

Will Mexican petunias root in water?

Cut off a piece of stem, remove the lower leaves, & stick it in the ground. You can also root them in water. If it is warm, they can wilt, so water rooting may be better. You can stick the entire cutting in water to refresh it, & when temperatures cool off, stick the roots only in water.

Where should I plant Mexican petunia?

Mexican petunia grows and blooms best in full sun or partial shade. It will grow in shade, but doesn’t bloom as much and looks leggy and lanky. This sun-loving perennial likes rich, slightly moist soil so mulch the plants to maintain consistent soil conditions, especially during hot, dry weather.