Asclepias spp. (Milkweed) - Monthly Plant Care Calendar
Written by Steve Brigham
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In the mild Southern California coastal climates, many kinds of milkweeds may be grown in the garden. Two of the best are Asclepias curassavica and Asclepias physocarpa, both of which are evergreen and nearly everblooming in frost-free areas. However, many cold-hardy species such as Asclepias tuberosa may perform poorly due to lack of winter cold and summer heat.
Here's what you should be doing each month of the year for this plant in Sunset Zones 23 & 24: Find Your Climate Zone.
January - February - March - April - May - June - July - August - September - October - November - December
January
BUY
Buy plants in nurseries or by mail anytime they are available.
PLANT
Plant any time.
WATER
Water regularly during dry periods.
TREAT FOR PEST/DISEASE
Do NOT use pesticides on milkweeds, or you will kill the butterflies and their children that live on them.
February
Flowering Shrubs: Get plant care reminders sent to you for the plants in YOUR garden. Click below to visit each plant and their available plant care! Plant Care (382)Rosa hybrid 'Sunstruck' Sunstruck Hybrid Tea Rose 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 SteveBrigham |
BUY
Buy plants in nurseries or by mail anytime they are available.
PLANT
Plant any time.
WATER
Water regularly during dry periods.
PRUNE
Cut back plants in late winter to promote new spring growth.
TREAT FOR PEST/DISEASE
Do NOT use pesticides on milkweeds, or you will kill the butterflies and their children that live on them.
March
BUY
Buy plants in nurseries or by mail anytime they are available.
PLANT
Plant any time.
SOW SEEDS
Sow seeds in flats of potting soil when weather is warm.
FERTILIZE
Fertilize lightly in early spring to promote new growth.
WATER
Water regularly during dry periods.
MULCH
Mulch to conserve water use.
TREAT FOR PEST/DISEASE
Do NOT use pesticides on milkweeds, or you will kill the butterflies and their children that live on them.
PROPAGATE
Propagate by seed when weather is warm. Transplant young seedlings to larger pots and grow on before planting in the garden.
April
BUY
Buy plants in nurseries or by mail anytime they are available.
PLANT
Plant any time.
SOW SEEDS
Sow seeds in flats of potting soil when weather is warm.
WATER
Water regularly during dry periods.
TREAT FOR PEST/DISEASE
Do NOT use pesticides on milkweeds, or you will kill the butterflies and their children that live on them.
TRANSPLANT
If desired, divide and transplant mature clumps in late spring as new growth begins.
PROPAGATE
Propagate by seed when weather is warm. Transplant young seedlings to larger pots and grow on before planting in the garden.
May
BUY
Buy plants in nurseries or by mail anytime they are available.
PLANT
Plant any time.
SOW SEEDS
Sow seeds in flats of potting soil when weather is warm.
WATER
Water regularly during dry periods.
TREAT FOR PEST/DISEASE
Do NOT use pesticides on milkweeds, or you will kill the butterflies and their children that live on them.
TRANSPLANT
If desired, divide and transplant mature clumps in late spring as new growth begins.
PROPAGATE
Propagate by seed when weather is warm. Transplant young seedlings to larger pots and grow on before planting in the garden.
June
BUY
Buy plants in nurseries or by mail anytime they are available.
PLANT
Plant any time.
SOW SEEDS
Sow seeds in flats of potting soil when weather is warm.
FERTILIZE
Fertilize in early summer to promote vigorous growth.
WATER
Water regularly during dry periods.
PRUNE
If you don't want seed pods and seeds, remove seed pods before they ripen to promote more flowers.
MULCH
Mulch to conserve water use.
PEST/DISEASE INSPECTION
Orange aphids and the larger orange and black bugs which eat them will not spread to other kinds of plants and do little harm. Don't harm them.
TREAT FOR PEST/DISEASE
Do NOT use pesticides on milkweeds, or you will kill the butterflies and their children that live on them.
PROPAGATE
Propagate by seed when weather is warm. Transplant young seedlings to larger pots and grow on before planting in the garden.
July
BUY
Buy plants in nurseries or by mail anytime they are available.
PLANT
Plant any time.
SOW SEEDS
Sow seeds in flats of potting soil when weather is warm.
WATER
Water regularly during dry periods.
PRUNE
If you don't want seed pods and seeds, remove seed pods before they ripen to promote more flowers.
PEST/DISEASE INSPECTION
Orange aphids and the larger orange and black bugs which eat them will not spread to other kinds of plants and do little harm. Don't harm them.
TREAT FOR PEST/DISEASE
Do NOT use pesticides on milkweeds, or you will kill the butterflies and their children that live on them.
PROPAGATE
Propagate by seed when weather is warm. Transplant young seedlings to larger pots and grow on before planting in the garden.
August
BUY
Buy plants in nurseries or by mail anytime they are available.
PLANT
Plant any time.
SOW SEEDS
Sow seeds in flats of potting soil when weather is warm.
WATER
Water regularly during dry periods.
PRUNE
If you don't want seed pods and seeds, remove seed pods before they ripen to promote more flowers.
PEST/DISEASE INSPECTION
Orange aphids and the larger orange and black bugs which eat them will not spread to other kinds of plants and do little harm. Don't harm them.
TREAT FOR PEST/DISEASE
Do NOT use pesticides on milkweeds, or you will kill the butterflies and their children that live on them.
PROPAGATE
Propagate by seed when weather is warm. Transplant young seedlings to larger pots and grow on before planting in the garden.
September
BUY
Buy plants in nurseries or by mail anytime they are available.
PLANT
Plant any time.
SOW SEEDS
Sow seeds in flats of potting soil when weather is warm.
FERTILIZE
Fertilize in early fall to prolong growth and bloom.
WATER
Water regularly during dry periods.
PRUNE
If you don't want seed pods and seeds, remove seed pods before they ripen to promote more flowers.
MULCH
Mulch to conserve water use.
PEST/DISEASE INSPECTION
Orange aphids and the larger orange and black bugs which eat them will not spread to other kinds of plants and do little harm. Don't harm them.
TREAT FOR PEST/DISEASE
Do NOT use pesticides on milkweeds, or you will kill the butterflies and their children that live on them.
PROPAGATE
Propagate by seed when weather is warm. Transplant young seedlings to larger pots and grow on before planting in the garden.
October
BUY
Buy plants in nurseries or by mail anytime they are available.
PLANT
Plant any time.
WATER
Water regularly during dry periods.
PRUNE
If you don't want seed pods and seeds, remove seed pods before they ripen to promote more flowers.
PEST/DISEASE INSPECTION
Orange aphids and the larger orange and black bugs which eat them will not spread to other kinds of plants and do little harm. Don't harm them.
TREAT FOR PEST/DISEASE
Do NOT use pesticides on milkweeds, or you will kill the butterflies and their children that live on them.
November
BUY
Buy plants in nurseries or by mail anytime they are available.
PLANT
Plant any time.
WATER
Water regularly during dry periods.
TREAT FOR PEST/DISEASE
Do NOT use pesticides on milkweeds, or you will kill the butterflies and their children that live on them.
December
BUY
Buy plants in nurseries or by mail anytime they are available.
PLANT
Plant any time.
WATER
Water regularly during dry periods.
TREAT FOR PEST/DISEASE
Do NOT use pesticides on milkweeds, or you will kill the butterflies and their children that live on them.
If you have information like this for your region and would like to share it please let us know, we'll be sure to give you writing credit and link back to your website! Click here to contact us.
You can get these instructions sent directly to your Profile page, click here to learn how.
- You can get Plant Care Reminders sent directly to your Profile page, learn how.
- See all of Steve Brigham's Monthly Plant Care Reminders here.
- See all available Plant Care Reminders at the Plant Care Hub here.
- Search for plant care alphabetically here.
- Add Asclepias. to one of your plant lists, learn how.
- Search our plant database for photos and more great information here.

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