Showy Milkweed

Year-round

Showy milkweed is a sun loving perennial that dies back and regrows from its roots each year, and it is the plant monarch caterpillars must have to grow into butterflies.

• Give it full sun, at least 6 hours a day, and well draining soil.
• In the heavier black clay soils in North Texas, plant it high on a slight mound or work in compost so water does not pool at the roots; in the sandier soils west of the metro it drains faster but the plant will need water more often through its first summer.
• It spreads slowly by underground roots over a few years, so give it 2 to 3 feet of open room or plan to divide it later.
• Water deeply about once a week for the first growing season, then only during extended dry spells once it is established.
• Wear gloves when cutting or breaking stems, the milky white sap can irritate skin and eyes and is toxic to dogs, cats, and horses if eaten.

Fall

By fall the flowers give way to warty green seed pods that split open and release seeds on silky white floss, and the first frost, mid November, ends the growing season.

• Let seed pods mature and split on their own in September and October if you want more plants; cut them off before they open if you want to keep the spread under control.
• Cut plants back to about 4 to 6 inches after the first hard freeze in November.
• Skip dividing or transplanting in fall, wait for next spring instead, since North Texas fall planting is better reserved for trees, shrubs, and vines.
• Rake up and compost the dry stems and floss once they turn brown.

Split seed pods release white silky floss that can drift into nearby yards; cutting pods before they fully open keeps the bed tidy through fall.

Winter

Showy milkweed dies back completely in winter and the roots stay dormant underground until spring; North Texas winters are mild with short hard freezes and occasional severe Arctic outbreaks.

• Leave the 4 to 6 inch cut stems in place through winter, the hollow stems can shelter overwintering insects.
• Do not water beyond normal rainfall in winter, the dormant roots do not need it.
• Mark the spot with a plant tag or edging since the bed will look empty until new shoots return in spring.
• A layer of mulch over the root zone helps protect it during a hard Arctic freeze, though established plants tolerate USDA zone 8a to 8b winters without extra protection.

An empty looking bed in winter can read as neglected; a plant tag or clean mulched edge signals it is dormant, not abandoned.

Spring

Spring is the best time to plant showy milkweed in North Texas, and new stems push up slowly from the ground once the soil warms.

• Plant nursery starts after the last frost, mid March, so young roots are not caught by a late freeze.
• New shoots come up slowly and the spot can look bare into April before growth catches up.
• Starting in April, check the undersides of leaves for small yellow orange monarch eggs and tiny striped caterpillars.
• Water twice a week for the first 4 to 6 weeks after planting to help roots establish before summer heat arrives.

New spring growth is a few scattered bare stems for several weeks; a mulch ring around the base signals it is a planted bed, not an empty patch.

Summer

Showy milkweed blooms in rose pink clusters from June through August, and this is when North Texas summer heat tests new plantings the hardest.

• Plants that have been in the ground a full year or more need little to no extra water once summer heat sets in.
• First-summer plants still need a deep soak about once a week during the 100F stretches in July and August, especially in the sandier soils west of the metro.
• Expect monarch caterpillars to strip leaves down to bare stems in July and August, this is normal and the plant regrows.
• Do not spray for the caterpillars eating the leaves, they are the reason to grow the plant.
• Remove spent flower clusters if you want to slow reseeding, or leave them so seed pods can form.

The pink flower clusters read as an intentional planted bed; stripped leaves from monarch caterpillars in late summer can look alarming to neighbors, a small sign noting it is a butterfly host plant heads off questions.

Year-round

Showy milkweed is a sun loving perennial that dies back and regrows from its roots each year, and it is the plant monarch caterpillars must have to grow into butterflies.

• Give it full sun, at least 6 hours a day, and well draining soil.
• In the heavier black clay soils in North Texas, plant it high on a slight mound or work in compost so water does not pool at the roots; in the sandier soils west of the metro it drains faster but the plant will need water more often through its first summer.
• It spreads slowly by underground roots over a few years, so give it 2 to 3 feet of open room or plan to divide it later.
• Water deeply about once a week for the first growing season, then only during extended dry spells once it is established.
• Wear gloves when cutting or breaking stems, the milky white sap can irritate skin and eyes and is toxic to dogs, cats, and horses if eaten.

Fall

By fall the flowers give way to warty green seed pods that split open and release seeds on silky white floss, and the first frost, mid November, ends the growing season.

• Let seed pods mature and split on their own in September and October if you want more plants; cut them off before they open if you want to keep the spread under control.
• Cut plants back to about 4 to 6 inches after the first hard freeze in November.
• Skip dividing or transplanting in fall, wait for next spring instead, since North Texas fall planting is better reserved for trees, shrubs, and vines.
• Rake up and compost the dry stems and floss once they turn brown.

Split seed pods release white silky floss that can drift into nearby yards; cutting pods before they fully open keeps the bed tidy through fall.

Winter

Showy milkweed dies back completely in winter and the roots stay dormant underground until spring; North Texas winters are mild with short hard freezes and occasional severe Arctic outbreaks.

• Leave the 4 to 6 inch cut stems in place through winter, the hollow stems can shelter overwintering insects.
• Do not water beyond normal rainfall in winter, the dormant roots do not need it.
• Mark the spot with a plant tag or edging since the bed will look empty until new shoots return in spring.
• A layer of mulch over the root zone helps protect it during a hard Arctic freeze, though established plants tolerate USDA zone 8a to 8b winters without extra protection.

An empty looking bed in winter can read as neglected; a plant tag or clean mulched edge signals it is dormant, not abandoned.

Spring

Spring is the best time to plant showy milkweed in North Texas, and new stems push up slowly from the ground once the soil warms.

• Plant nursery starts after the last frost, mid March, so young roots are not caught by a late freeze.
• New shoots come up slowly and the spot can look bare into April before growth catches up.
• Starting in April, check the undersides of leaves for small yellow orange monarch eggs and tiny striped caterpillars.
• Water twice a week for the first 4 to 6 weeks after planting to help roots establish before summer heat arrives.

New spring growth is a few scattered bare stems for several weeks; a mulch ring around the base signals it is a planted bed, not an empty patch.

Summer

Showy milkweed blooms in rose pink clusters from June through August, and this is when North Texas summer heat tests new plantings the hardest.

• Plants that have been in the ground a full year or more need little to no extra water once summer heat sets in.
• First-summer plants still need a deep soak about once a week during the 100F stretches in July and August, especially in the sandier soils west of the metro.
• Expect monarch caterpillars to strip leaves down to bare stems in July and August, this is normal and the plant regrows.
• Do not spray for the caterpillars eating the leaves, they are the reason to grow the plant.
• Remove spent flower clusters if you want to slow reseeding, or leave them so seed pods can form.

The pink flower clusters read as an intentional planted bed; stripped leaves from monarch caterpillars in late summer can look alarming to neighbors, a small sign noting it is a butterfly host plant heads off questions.