When can I plant Tropical Water Plants in Zone 9b

One of the best tools that we have as gardeners to help us figure out our gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for our area.

You should be able to estimate when you can plant tropical water plants by looking at the USDA zone info for Zone 9b.


Planting Calendar for Tropical Water Plants

Frost tolerance for tropical water plants: Not tolerant of frost.
When you should plant them: After the last frost has passed.

Tropical Water Plants are not cold tolerant which tells us that it is necessary to wait until it warms up after all chance of frost has passed before you can plant them.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant tropical water plants
Possibly ok, but a risky time to plant tropical water plants
Probably not a good time to plant tropical water plants

The earliest that you can plant tropical water plants in Zone 9b is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant tropical water plants and expect a good harvest is probably September. Any later than that and your tropical water plants may not have a chance to really do well. If you are starting your tropical water plants indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on February 15 in Zone 9b. It might get as low as 25°F during the coldest months of winter.

Since the USDA zone info for Zone 9b may not be accurate from year to year our actual date of last frost can change quite a bit from year to year. Since half of the time in Zone 9b we get a frost after February 15 be ready to protect your tropical water plants in the event of a late frost.

USDA Zone Info for Zone 9b

Here is the info for USDA Zone 9b.

Average Date of Last Frost (spring)February 15
Average Date of First Frost (fall)December 15
Lowest Expected Low25°F
Highest Expected Low30°F

This means that on a really cold year, the coldest it will get is 25°F. On most years you should be prepared to experience lows near 30°F.

Plants to Grow in Zone 9b

You may be interested in our other planting guides for Zone 9b.